Table of Contents
Overview
Definition of Propulsion
Propulsion refers to the mechanism that drives an object forward, derived from the Latin words "pro," meaning before or forwards, and "pellere," meaning to drive. A propulsion system is a machine designed to produce thrust, which is the force that propels an object in a specific direction. In the context of aviation, thrust is typically generated through various means, including internal combustion engines, gas turbine engines, electric propulsion systems, and rocket propulsion systems.[2.1] Propulsion systems are essential for powering various vehicles and can be categorized into several types, including internal combustion engines, gas turbine engines, electric propulsion systems, and rocket propulsion systems.[1.1] Jet propulsion systems, which utilize air-breathing engines, are predominantly used in aircraft to generate thrust, offering a clean and efficient alternative to traditional internal combustion engines, particularly for ground vehicles like cars, buses, and trucks.[1.1] In contrast, rocket propulsion systems operate by expelling combustion exhaust gases, which enables them to function effectively in the vacuum of space where atmospheric air is absent.[3.1] The components of a rocket propulsion system include the rocket engine, tanks, pumps, propellants, power head, and rocket nozzle.[3.1] Understanding the various types of propulsion systems is crucial for appreciating how different engines and motors contribute to the operation of vehicles, from everyday transportation to advanced aerospace applications.[1.1]Importance of Propulsion Systems
Propulsion systems are essential components of aerospace technology, enabling both aircraft and spacecraft to function effectively. The two primary types of propulsion systems are jet engines and rockets, which operate on fundamentally different principles. A significant distinction between these systems is the source of their oxidizer: jet propulsion utilizes atmospheric oxygen, which is drawn into the engine, while rocket propulsion carries its own oxidizer onboard.[11.1] This difference necessitates distinct designs and applications for each type of propulsion system. Jet engines compress and mix the intake air with fuel before ignition, making them suitable for operation within the Earth's atmosphere.[12.1] In contrast, rockets are specifically engineered for space exploration, where there is no atmospheric oxygen available, thus requiring an in-built oxidizer to facilitate combustion.[11.1] Understanding these differences is vital for the development and optimization of various aerospace vehicles. The historical development of propulsion technology can be traced back to the early use of black powder in Asia during the 1200-1300 period, where this mixture of saltpetre, sulfur, and charcoal was primarily utilized for military applications.[4.1] This early innovation laid the groundwork for the evolution of modern propulsion systems. In contemporary aerospace engineering, gas turbine engines are modeled using the Brayton cycle, which facilitates the derivation of expressions for efficiency and work as functions of temperature at various points in the cycle.[8.1] Improvements in specific fuel consumption for gas turbine engines have been achieved due to higher propulsive and thermal efficiency.[5.1] Understanding these efficiencies is essential for optimizing the performance of propulsion systems across various applications. In recent years, electric propulsion systems have emerged as a promising alternative, particularly for space missions. Innovations in this field include enhancements in plasma control, the introduction of new control mechanisms, and the exploration of alternative propellants to xenon.[16.1] Research is ongoing to address the challenges posed by new missions, such as Mars and Moon exploration, and to improve the efficiency of electric thrusters through advanced materials and designs.[19.1] These advancements not only enhance the performance of electric propulsion systems but also expand their applicability in future aerospace endeavors.In this section:
History
Key Milestones in Aviation and Space Propulsion
The development of propulsion technology has undergone significant transformations, marked by key milestones that have shaped both aviation and space exploration. One of the earliest breakthroughs was the V-2 rocket, developed in Nazi Germany between 1936 and 1942. This rocket is recognized as the world's first large-scale liquid-propellant rocket and represented a revolutionary advancement in rocket technology, influencing subsequent developments in both military and space applications.[54.1] Despite its origins as a weapon of destruction, the V-2's technological advancements in propulsion, guidance, and control systems laid the groundwork for future space exploration efforts.[47.1] Following World War II, the legacy of the V-2 rocket significantly impacted international military strategies and the onset of the Space Race. The United States and the Soviet Union scrambled to capture and repurpose V-2 technology, recognizing its potential for scientific exploration and military applications.[52.1] This period saw the missile eclipse traditional aerial bombers as the primary delivery method for both conventional and atomic payloads, marking a pivotal shift in military strategy.[51.1] Furthermore, many engineers and scientists involved in the V-2 program later contributed to American space exploration initiatives, intertwining the rocket's legacy with the history of the Space Race.[53.1] As the 20th century progressed, advancements in rocket technology led to the development of larger and more powerful rockets, which were utilized for both military and space exploration purposes.[49.1] Recent innovations in propulsion systems, particularly in electric propulsion and nuclear thermal propulsion, are significantly enhancing the efficiency of deep space missions compared to traditional chemical rockets.[55.1] Electric propulsion systems, which include technologies such as ion and Hall Effect thrusters, are emerging as leading candidates for long-duration missions, although they are limited by the availability of solar energy in deep space.[56.1] Current advancements in electric propulsion involve enhancements in plasma control and the introduction of alternative propellants to xenon, addressing the challenges posed by ambitious missions to Mars, the Moon, and beyond.[57.1] These developments are crucial as they not only improve propulsion efficiency but also support the growing demands of advanced astrophysical studies and the exploration of exoplanets.[57.1] The evolution of propulsion technology plays a crucial role in shaping international space policy, particularly through the lens of global collaboration. This collaboration encompasses a wide range of activities, including manned space missions, scientific research, and satellite deployments, which collectively offer significant benefits while also presenting unique challenges.[58.1] As space missions, especially those involving human spaceflight or deep space exploration, entail substantial costs, the need for cost-sharing and financial efficiency becomes increasingly important.[58.1] Despite the challenges that arise from such collaborative efforts, the future of space exploration is leaning towards a more cooperative approach, highlighting the complex interplay of benefits and challenges that nations face in their pursuit of interstellar exploration.[58.1]Types Of Propulsion Systems
Air-Breathing Propulsion Systems
Air-breathing propulsion systems, which include gas turbines and internal combustion engines, leverage the principles of thermodynamics to enhance performance and efficiency. In gas turbines, waste heat is utilized to generate steam, which drives a steam turbine, thereby improving overall efficiency.[109.1] This integration exemplifies the application of thermodynamic principles in optimizing energy conversion processes. The thermodynamic performance of gas turbines can be modeled using various approaches that predict efficiency and output, highlighting the importance of thermodynamics in the design and operation of these systems.[109.1] Additionally, advancements such as pressure gain combustion (PGC) have been developed to further enhance the efficiency of gas turbine combined cycles. PGC utilizes a steady-state zero-dimensional constant volume combustion model, which incorporates practical loss models for realistic interpretations.[110.1] In the realm of internal combustion engines, the pursuit of higher performance and efficiency remains a primary objective. Fundamental thermodynamic principles, particularly the first and second laws, provide strategies and establish limits on the thermal efficiencies achievable by these engines.[111.1] Continuous research and development efforts focus on optimizing designs, such as the Otto cycle, which, despite its maturity, is still evolving to improve efficiency and reduce environmental impact.[112.1] Recent advancements in automotive engine thermodynamics have demonstrated significant improvements in efficiency. For instance, cycle simulations have shown an increase in net indicated thermal efficiency from 37.0% to 53.9%, attributed to features such as high compression ratios, lean mixtures, and high exhaust gas recirculation (EGR).[113.1] These innovations not only enhance work conversion but also minimize heat losses and reduce emissions, particularly nitric oxides, due to lower combustion temperatures.[113.1]Non-Air-Breathing Propulsion Systems
Non-air-breathing propulsion systems are a category of propulsion technologies that do not rely on atmospheric oxygen to generate thrust. These systems are primarily utilized in space travel and include rocket propulsion systems, which are designed to operate in the vacuum of space where air is not available. Rocket engines generate thrust by expelling mass at high velocity, following Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. This principle allows rockets to achieve the necessary thrust to escape Earth's gravitational pull and navigate through space. Non-air-breathing propulsion systems encompass a variety of technologies, including electric propulsion systems that utilize electric energy to accelerate propellant. These systems face several challenges, such as efficiency issues, uneven current distribution in RF plasma thrusters, and magnetic field variability that can affect thruster stability.[34.1] While the first all-electric aircraft are currently operating with voltages of up to about 500, there is ongoing discussion among designers regarding the potential for megawatt-class electrified propulsion systems aimed at single-aisle airliners.[120.1] Addressing these challenges is crucial for the broader adoption of electric propulsion technologies in various transportation sectors.Recent Advancements
Innovations in Rocket Propulsion Technologies
Recent advancements in rocket propulsion technologies have significantly transformed the landscape of space exploration and transportation. The evolution of propulsion systems has been marked by a shift from traditional chemical rockets to innovative methods that enhance efficiency and reduce environmental impact. For instance, modern rocket propulsion technologies now include reusable rocket designs that are engineered to return to Earth and be launched multiple times, contrasting sharply with traditional rockets that are typically discarded after a single use.[127.1] This advancement not only lowers launch costs but also increases the availability of space for various missions.[129.1] In the realm of electric propulsion, which has been under development for nearly a century, there has been a notable transition from a niche interest to a focus of major corporations.[122.1] Electric propulsion systems, while producing lower thrust, are highly efficient and capable of achieving high velocities over extended periods, making them particularly suitable for deep-space missions.[128.1] This efficiency is complemented by advancements in materials science, which have led to the development of lightweight and durable materials, such as advanced composites and titanium alloys, that enhance the overall performance of propulsion systems.[132.1] Recent advancements in rocket propulsion technologies have led to significant breakthroughs, particularly with the introduction of ion propulsion systems. These systems utilize electric power to ionize and accelerate propellant, resulting in higher efficiency, longer operational lifespans, and greater speeds compared to traditional chemical rockets.[126.1] Additionally, innovations in materials science have played a crucial role in enhancing the performance and durability of propulsion systems. For instance, NASA's research has focused on developing high-temperature, lightweight materials, such as Ceramic Matrix Composites, which are designed for turbine engine applications operating at temperatures up to 2700 degrees Fahrenheit.[132.1] Furthermore, QuesTek Innovations has introduced new stainless-steel-type alloys, including Ferrium S53, which offers improved tensile strength and corrosion resistance, thereby enabling propulsion systems to withstand extreme conditions.[133.1] These advancements collectively contribute to the evolution of propulsion technologies, emphasizing efficiency and environmental sustainability.Emerging Propulsion Technologies for Space Exploration
Recent advancements in propulsion technologies are significantly shaping the future of space exploration. Notably, electric propulsion (EP) systems have emerged as a pivotal technology, particularly for deep space missions, due to their enhanced efficiency compared to traditional chemical rockets. These systems allow for longer mission durations and increased maneuverability, making them particularly advantageous for small satellite missions and interplanetary exploration.[134.1] However, the efficiency of electric propulsion is contingent upon the availability of power in deep space, where solar energy is often limited.[125.1] Innovations in electric propulsion include improvements in plasma control within EP thrusters and the introduction of alternative propellants to xenon, which address the evolving requirements of contemporary space missions. These advancements are crucial for tackling new challenges such as Mars and Moon exploration, the construction of large satellite constellations like Starlink and OneWeb, and advanced astrophysical studies.[139.1] Furthermore, NASA's recent propulsion technology developments are enhancing the capabilities of small spacecraft for future planetary missions, enabling them to operate for extended periods and utilize propellant more efficiently.[138.1] As the demand for more capable and sustainable satellite missions increases, advancements in propulsion technology will be essential in meeting these needs and pushing the boundaries of space exploration.[137.1] The integration of these technologies not only supports scientific inquiry but also fosters international collaboration, as nations seek to leverage these advancements for mutual benefit in space exploration endeavors.[140.1]In this section:
Materials ScienceCeramic Matrix CompositesCorrosion ResistanceExtreme ConditionsEnvironmental Sustainability
Environmental Impact And Sustainability
Challenges of Traditional Propulsion Systems
Traditional propulsion systems, especially in the maritime and aerospace sectors, are increasingly criticized for their environmental repercussions. The maritime industry, a cornerstone of global trade and security, relies heavily on fossil fuels, which are major contributors to greenhouse gas emissions and marine pollution.[198.1] In aerospace, the environmental impact is multifaceted, involving the interaction of combustion by-products with the atmosphere and the toxicity of propellants.[199.1] Research highlights the formation of aerosols from aviation-related nitrogen and sulfur oxides, emphasizing the urgent need for propulsion system advancements to mitigate air quality and climate impacts.[200.1] Incomplete combustion in these systems releases harmful pollutants, including organic compounds, metals, and fine particulate matter, posing significant global health challenges.[202.1] These pollutants affect both industrialized and developing nations, where reliance on unprocessed biomass fuels remains prevalent. Addressing these challenges requires a shift towards sustainable practices within the propulsion industry. While the related section on sustainable practices discusses innovations like hydrogen and electric propulsion, this section underscores the pressing environmental challenges posed by traditional systems. By focusing on the detrimental effects of current technologies, this section highlights the necessity for cleaner propulsion systems and the integration of advanced materials and digital solutions to reduce environmental impact and foster a sustainable transportation future.[201.1]Sustainable Practices in Propulsion Technology
Sustainable practices in propulsion technology are increasingly vital as the aviation industry aims for net-zero emissions by 2050. Key innovations include hydrogen propulsion, hybrid-electric systems, and turbo-electric engines, which are essential for balancing sustainability goals with operational performance.[172.1] The development of hybrid-electric propulsion systems, which combine traditional fuel-burning engines with electric motors and batteries, presents significant opportunities to enhance fuel efficiency and reduce carbon dioxide emissions in aviation.[171.1] Moreover, the integration of sustainable aviation fuels (SAF) is critical for achieving these sustainability targets. Governments are encouraged to implement policy frameworks that provide production incentives for SAF, which can help realize cost-effective new technologies aligned with the objectives of the Paris Agreement.[173.1] Additionally, optimizing air traffic management and advancing hydrogen and electric propulsion technologies are recognized pathways to promote sustainable practices within the industry.[174.1] The environmental impact of propulsion systems has been a subject of extensive research, highlighting the need for thoughtful planning to mitigate adverse effects such as ozone depletion and acid rain caused by rocket launches.[164.1] As the industry explores transformative engine options, including open fan and electric propulsion systems, collaboration with stakeholders is essential to accelerate the development of these innovative technologies.[166.1]Applications Of Propulsion
Aviation and Aerospace Applications
Aviation and aerospace applications of propulsion systems encompass a variety of technologies designed to meet the specific demands of flight and space travel. Jet propulsion systems are predominantly utilized in commercial aviation, where they rely on atmospheric oxygen as the oxidizer to generate thrust. This method involves the intake of air, which is compressed and mixed with fuel before ignition, allowing for efficient operation within the Earth's atmosphere.[226.1] The efficiency and reliability of jet engines make them the preferred choice for aircraft, enabling them to achieve the necessary performance for passenger and cargo transport. In contrast, rocket propulsion systems are essential for space exploration, as they carry their own oxidizers due to the absence of atmospheric oxygen in space. This fundamental difference allows rockets to operate in a vacuum, where they utilize an in-built oxidizer to facilitate combustion.[225.1] The design of rocket engines is complex, often involving liquid-propellant engines (LPEs) that face unique challenges in optimizing performance parameters, particularly in thrust chamber design.[240.1] Electric propulsion systems are emerging as a transformative technology in both aviation and aerospace sectors. These systems promise enhanced efficiency and reduced environmental impact, aligning with global sustainability goals. They are particularly advantageous in applications where traditional propulsion methods may fall short, such as in urban air mobility and space missions.[210.1] The integration of electric propulsion into aerospace technology is expected to significantly alter approaches to sustainable transportation on Earth and beyond. Furthermore, advancements in artificial intelligence (AI) are revolutionizing the design and optimization of rocket propulsion technologies. AI-driven solutions are being employed to enhance the efficiency and performance of rocket engines, addressing some of the most significant challenges in the aerospace industry.[239.1] Additionally, innovations such as Metal Additive Manufacturing (AM) are providing substantial benefits in terms of cost and lead time for rocket engine production, further pushing the boundaries of propulsion technology.[241.1]Automotive and Marine Applications
The transition to electric vehicles (EVs) represents a significant shift in the automotive sector, driven not only by technological advancements but also by government policies and regulations that are crucial for market development. These policies include financial incentives and infrastructure investments aimed at promoting EV adoption, which have been shown to accelerate the transition towards sustainable transportation and reduce greenhouse gas emissions.[213.1] However, the actual adoption of EVs varies significantly across different countries. For instance, while nations like Norway exhibit high enthusiasm for electric vehicles, countries such as Australia and Japan have seen relatively low numbers of EVs on the road.[214.1] The electrification of various transportation sectors, including aviation, is an emerging area of research that addresses significant operational requirements and technical challenges. A case study focusing on the potential deployment of small commercial electric aircraft highlights the need for robust policy and regulatory frameworks to support the adoption of electric propulsion systems. This case study also emphasizes the importance of addressing questions related to charging infrastructure, grid integration, and emissions impacts, which are critical for the successful transition to electric propulsion in aviation and potentially other sectors.[215.1] Furthermore, it outlines potential nearer-term solutions and identifies research areas that will require attention in the longer term, particularly as the scale of electrification efforts increases.[215.1] Battery technology is a critical factor influencing the performance and future of electric vehicles (EVs) and marine applications. Recent advancements in battery systems have significantly enhanced key aspects such as range, charging speed, longevity, and overall efficiency, making EVs more attractive compared to traditional gasoline-powered vehicles.[216.1] The rapid expansion of the EV market worldwide has been driven by increased options, reduced pricing, and these advancements in battery technology.[217.1] However, as electric vehicles reach the end of their designed lifespan, challenges such as battery performance degradation and increased maintenance costs arise, leading to their market exit.[218.1] Additionally, considerations regarding the handling of batteries and other critical components are essential to minimize environmental impact and ensure maximum recovery and reuse.[218.1] The integration of electric propulsion systems into existing vehicle designs, particularly in hybrid electric vehicles (HEVs) and electric vertical takeoff and landing (eVTOL) aircraft, presents significant engineering challenges. HEVs are designed to combine a conventional internal combustion engine (ICE) with one or more electric motors powered by batteries, which necessitates the development of advanced control systems, battery management systems, and thermal management solutions to optimize performance and efficiency.[230.1] In the case of eVTOL aircraft, the development process involves addressing complexities related to designing efficient propulsion systems and ensuring the reliability and longevity of batteries.[231.1] Electric propulsion, which utilizes electric motors and associated systems, serves as an alternative to traditional propulsion methods that rely on internal combustion engines.[232.1] As the industry evolves, overcoming these engineering challenges will be essential for the successful adoption of electric propulsion technologies across various transportation sectors.In this section:
Future Perspectives
Theoretical Concepts and Future Technologies
Theoretical concepts and future technologies in propulsion systems are evolving rapidly, driven by the need for sustainability and efficiency in aviation. Advanced propulsion technologies are being explored, including ultra-high bypass turbofan engines, multi-combustor systems, and multifuel propulsion systems that utilize both kerosene and cryogenic fuels. These innovations aim to enhance energy efficiency and reduce environmental impact.[249.1] Hydrogen propulsion systems are also gaining attention, with a focus on their technical aspects necessary for creating a more sustainable air transportation sector. Challenges related to onboard hydrogen storage and the overall application of hydrogen in aviation are critical areas of ongoing research.[250.1] Electric propulsion is increasingly recognized as the future of aviation, with applications extending across a wide range of commercial and government sectors, including cubesats, low Earth orbit (LEO) constellations, geostationary (GEO) communications satellites, deep space science missions, and the human-tended Lunar Gateway.[251.1] A key development in this area is the High-Efficiency Megawatt Motor (HEMM), which is specifically designed to meet the propulsion needs of electrified aircraft, boasting a power output of 1.4 megawatts.[252.1] As the electrification of aircraft continues to advance, it is crucial to focus on the design of efficient charging systems, which are essential for integrating electric propulsion into commercial airports.[254.1] Furthermore, addressing the challenges associated with charging infrastructure, grid integration, and regulatory requirements will be vital for the successful deployment of small commercial electric aircraft in underserved markets.[255.1] Hybrid-electric propulsion is emerging as a transformative solution, combining traditional and electric power sources to improve energy management and reduce fuel consumption. This technology is being actively developed through partnerships among major aerospace companies, focusing on scalable systems for distributed propulsion concepts.[268.1] The EcoPulse project exemplifies this trend, showcasing a distributed hybrid propulsion aircraft developed by industry leaders.[266.1]References
[1] Propulsion System: An Overview of Types of Propulsion Systems — These include internal combustion engines, gas turbine engines, electric propulsion systems, and rocket propulsion systems. Jet propulsion systems are commonly used in aircraft, utilizing air-breathing engines to generate thrust. This clean and efficient propulsion system offers a promising alternative to conventional internal combustion engines, particularly for vehicles like cars, buses, and trucks. Understanding “what is a propulsion system” and the various types of propulsion systems is key to appreciating how different engines and motors help power our world. From the everyday reliability of internal combustion engines to the innovative efficiency of electric propulsion systems, each propulsion system has its unique benefits and applications. Gas turbine engines and rocket propulsion systems provide the necessary high thrust and power requirements for aircraft and space travel, respectively.
[2] Beginner's Guide to Propulsion - NASA — Welcome to the Beginner's Guide to Propulsion: What is propulsion? The word is derived from two Latin words: pro meaning before or forwards and pellere meaning to drive.Propulsion means to push forward or drive an object forward. A propulsion system is a machine that produces thrust to push an object forward. On airplanes, thrust is usually generated through some application of Newton's third
[3] Propulsion System | Glenn Research Center | NASA — Propulsion System | Glenn Research Center | NASA The propulsion of a rocket includes all of the parts which make up the rocket engine, the tanks pumps, propellants, power head and rocket nozzle. Rocket Engine Turbine engines and propellers use air from the atmosphere as the working fluid, but rockets use the combustion exhaust gases. This explains why a rocket works in space but a turbine engine or a propeller does not work. With a liquid rocket, you can stop the thrust by turning off the flow of propellants; but with a solid rocket, you have to destroy the casing to stop the engine. Optional: Enter your name and email if you would like to be contacted about your feedback.
[4] Rocket - Propulsion, Jet, Vehicle | Britannica — Rocket - Propulsion, Jet, Vehicle: The technology of rocket propulsion appears to have its origins in the period 1200-1300 in Asia, where the first "propellant" (a mixture of saltpetre, sulfur, and charcoal called black powder) had been in use for about 1,000 years for other purposes. As is so often the case with the development of technology, the early uses were primarily military.
[5] Thermodynamic analysis of a gas turbine engine with a rotating ... — From the gas turbine engine perspective, the specific fuel consumption have been improved thanks to higher propulsive and thermal efficiency. ... Thermodynamic comparison between an ideal constant pressure cycle (Joule) and a pressure gain cycle (detonation). (a) ... The compressor efficiency was set at 0.85 in both engines and the sub-sonic
[8] 11 . 6 Performance of Jet Engines - MIT — 11. 6 Performance of Jet Engines. In Chapter 3 we represented a gas turbine engine using a Brayton cycle and derived expressions for efficiency and work as functions of the temperature at various points in the cycle. In this section we will perform further ideal cycle analysis to express the thrust and fuel efficiency of engines in terms of
[11] Jet Engine vs. Rocket Engine: Understanding the Differences — The major difference between jet and rocket propulsion is the oxidizer. Jet propulsion uses atmospheric oxygen as the oxidizer, while rocket propulsion uses an in-built oxidizer. Which is faster, a rocket or a jet? A rocket is faster than a jet due to the extremely high velocity of the ejection of mass.
[12] Jet Engine vs. Rocket Engine - What's the Difference? | This vs. That — Jet engines and rocket engines are both types of propulsion systems used in aircraft and spacecraft. However, they differ in their working principles and applications. Jet engines rely on the intake of air, which is compressed and mixed with fuel before being ignited.
[16] Recent innovations to advance space electric propulsion technologies — The innovations in the present space propulsion technologies include enhancing the plasma control in the electric propulsion (EP) thrusters, introduction of new control mechanisms, the utilization of alternative propellants to xenon, to address the requirements of the recently emerged missions. While many types of space EP systems are mature and active in space, significant progress is still required to address the new tasks and challenges that emerged recently, such as plans for Mars and Moon exploration , building huge satellite constellations such as Starlink and OneWeb [, , ], advanced astrophysical studies including space-based gravitational wave detection systems [, , , ], precise astrophysical and astronomical measurements in space [, , ], search for life on exoplanets , and others. To enhance the efficiency of the thrusters via innovative, not yet explored physical principles and technological approaches that were recently demonstrated in labs or conceptualised for the application in space propulsion systems;
[19] NASA is testing AEPS, the world's most powerful electric engine for ... — Recently, qualification tests for the new experimental Advanced Electric Propulsion System were conducted at NASA's research centre in Cleveland. AEPS shows great potential in heralding a new era of lunar and Martian exploration. NASA's AEPS advantages and testing. Advanced Electric Propulsion System (AEPS) is expected to be nearly three times more powerful than Hall's present cutting
[34] (PDF) Challenges and Innovations in Electric Propulsion Systems for ... — Traditional electric propulsion systems fac e efficiency issues, uneven current distribution in RF plasma thrusters, and challenges with magnetic field variability affecting thruster stability. [ 94 ]
[47] Evolution of rocket propulsion systems - Cosmo Science — Evolution of rocket propulsion systems - Cosmo Science | Explore the Universe | Space Exploration Although the V-2 was a weapon of destruction, its technological advancements in rocket propulsion, guidance, and control systems were instrumental in later space exploration efforts. While green propulsion is still in the early stages of widespread adoption, its development is a critical step toward making space exploration more sustainable and reducing the long-term environmental impact of rocket launches, both on Earth and in orbit. As technology continues to advance, the future of rocket propulsion holds the promise of even greater achievements, including the potential for human settlement on other planets, interstellar exploration, and the realization of the dream of space-faring civilizations.
[49] The Evolution of Rocket Technology: From Gunpowder to Modern Propulsion ... — The Evolution of Rocket Technology: From Gunpowder to Modern Propulsion Systems Over time, rocket technology developed and expanded, leading to the development of larger and more powerful rockets that would be used for space exploration and military purposes. Development of Rocket Propulsion Systems These missiles were used as weapons but also had significant implications for space exploration because they relied on rocket technology. In this section we will explore some areas where rocket technology is likely to develop: As rocket technology continues to evolve, scientists and engineers are exploring new ways to improve propulsion systems. In the 20th century, rocket technology was used for space exploration.
[51] The V-2 Rocket: Rise Of The Space Race And Cold War Missiles - The War Zone — The impact of this post-war exploitation was felt most directly throughout the fifteen or so years following the end of the war. It was during this period that the missile truly came of age, eclipsing the large aerial bomber as the principal method of delivery for both high explosive conventional payloads and atomic warheads.
[52] V-2 Rocket: Pioneering Space Exploration in the Post-War Era — A Race to the Stars: The V-2's Influence on the Space Race. The aftermath of World War II saw a scramble for captured V-2 technology. The Americans and the Soviets recognized the V-2's potential as a launch vehicle for scientific exploration. This newfound focus on space exploration marked the beginning of the Space Race.
[53] The V2 Rocket and the Dawn of the Space Age: A Technological Turning ... — Finally, the V2's legacy is intertwined with the history of the space race, as many of the engineers and scientists who worked on the V2 program later played key roles in the development of American space exploration.The V2 rocket, despite its dark origins and destructive purpose, played a pivotal role in shaping the future of science and space
[54] V2 rocket: Origin, history and spaceflight legacy | Space — The V2 rocket was the world's first large-scale liquid-propellant rocket, developed between 1936 and 1942 in Nazi Germany. It is regarded as a revolutionary breakthrough in rocket technology, with
[55] Advancements in Propulsion Systems for Deep Space Exploration — Advancements in Propulsion Systems for Deep Space Exploration - TechWeb Trends Recent advancements, particularly in electric propulsion, nuclear thermal propulsion, and novel concepts like pulsed plasma rockets, are pushing the boundaries of what’s possible in space travel. Electric propulsion (EP) systems have emerged as a key technology for deep space missions, offering a significant leap in efficiency over traditional chemical rockets. Electric propulsion systems, while efficient, are still limited by the availability of power in deep space, where solar energy is scarce. | viewed_cookie_policy | 11 months | The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies.
[56] PDF — Electric propulsion: The future of deep space exploration While nuclear propulsion offers significant advancements in efficiency and power, electric propulsion is emerging as a leading candidate for long-duration deep space missions. Electric propulsion, which includes ion and Hall Effect thrusters, uses electricity
[57] Recent innovations to advance space electric propulsion technologies — The innovations in the present space propulsion technologies include enhancing the plasma control in the electric propulsion (EP) thrusters, introduction of new control mechanisms, the utilization of alternative propellants to xenon, to address the requirements of the recently emerged missions. While many types of space EP systems are mature and active in space, significant progress is still required to address the new tasks and challenges that emerged recently, such as plans for Mars and Moon exploration , building huge satellite constellations such as Starlink and OneWeb [, , ], advanced astrophysical studies including space-based gravitational wave detection systems [, , , ], precise astrophysical and astronomical measurements in space [, , ], search for life on exoplanets , and others. To enhance the efficiency of the thrusters via innovative, not yet explored physical principles and technological approaches that were recently demonstrated in labs or conceptualised for the application in space propulsion systems;
[58] Global Collaboration in Space: Benefits and Challenges — Global Collaboration in Space: Benefits and Challenges | New Space Economy HomePolicy, Law, and RegulationGlobal Collaboration in Space: Benefits and Challenges Global Collaboration in Space: Benefits and Challenges This collaboration, encompassing a myriad of activities from manned space missions to scientific research and satellite deployments, offers significant benefits while also posing unique challenges. Benefits of Global Collaboration in Space Cost Sharing and Financial Efficiency: Space missions, especially those involving human spaceflight or deep space exploration, entail substantial costs. Challenges of Global Collaboration in Space Despite these challenges, the future of space exploration is increasingly collaborative. Global collaboration in space presents a complex mix of benefits and challenges. Space Economy Space Exploration About New Space Economy
[109] Thermodynamic modeling of gas turbines - Thermal Engineering — The waste heat from the gas turbine is utilized to generate steam, which in turn drives the steam turbine, enhancing overall efficiency. Modeling the Thermodynamics of Gas Turbines The thermodynamic performance of a gas turbine can be modeled using several approaches that help predict its efficiency and output.
[110] A Comprehensive Thermodynamic Analysis of Gas Turbine Combined Cycles ... — Abstract. The paper describes a comprehensive thermodynamic analysis of the gas turbine combined cycle (CC) equipped with pressure gain combustion (PGC) based on the Humphrey cycle. PGC is represented by a steady-state zero-dimensional constant volume combustion (CVC) model with practical loss models for a realistic interpretation. Simulations were performed in WTEMP (web-based thermo-economic
[111] The Thermodynamics of Internal Combustion Engines: Examples of ... - MDPI — A major goal of the development of internal combustion (IC) engines continues to be higher performance and efficiencies. A major aspect of achieving higher performance and efficiencies is based on fundamental thermodynamics. Both the first and second laws of thermodynamics provide strategies for and limits to the thermal efficiencies of engines. The current work provides three examples of the
[112] Otto Cycle | Efficiency, Stages & Thermodynamic Principles — Its efficiency and operational principles are fundamental to the design and functionality of modern internal combustion engines. Despite its maturity, the Otto cycle continues to evolve, with ongoing research and development focusing on improving efficiency and reducing environmental impact.
[113] The thermodynamic characteristics of high efficiency, internal ... — The thermodynamics of an automotive engine are determined using a cycle simulation. The net indicated thermal efficiency increased from 37.0% to 53.9%. High compression ratio, lean mixtures and high EGR were the important features. Efficiency increased due to lower heat losses, and increased work conversion. The nitric oxides were essentially zero due to the low combustion temperatures.
[120] What Are The Electric-Propulsion Challenges In Commercial Aviation? — The first all-electric aircraft are using voltages of up to about 500; however, designers who are looking at megawatt-class electrified-propulsion systems for single-aisle airliners are talking
[122] PDF — Indeed, the history of elec-tric propulsion (EP), which now spans almost a full century, particularly lends itself to a subdivision that epitomizes the progress of the field from its start as the dream realm of a few visionaries, to its transfor-mation into the concern of large corporations.
[125] Advancements in Propulsion Systems for Deep Space Exploration — Advancements in Propulsion Systems for Deep Space Exploration - TechWeb Trends Recent advancements, particularly in electric propulsion, nuclear thermal propulsion, and novel concepts like pulsed plasma rockets, are pushing the boundaries of what’s possible in space travel. Electric propulsion (EP) systems have emerged as a key technology for deep space missions, offering a significant leap in efficiency over traditional chemical rockets. Electric propulsion systems, while efficient, are still limited by the availability of power in deep space, where solar energy is scarce. | viewed_cookie_policy | 11 months | The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies.
[126] Review on Past, Present and Future Rocket Propulsion Technologies — higher efficiency, longer lifespan, and greate r speeds compared to traditional chemical rockets. For instance, ion propulsion systems, which use electric power to ionize and accelerate propellant
[127] Rocket Propulsion | Thrust, Dynamics & Efficiency - modern-physics.org — These rockets are designed to return to Earth, land vertically, and be prepared for subsequent launches, a stark contrast to traditional rockets that are discarded after a single use. Efficiency and Environmental Considerations. Efficiency in rocket propulsion not only pertains to fuel utilization but also encompasses environmental considerations.
[128] PDF — Although electrical propulsion produces low thrust, it is highly © 2024 JETIR November 2024, Volume 11, Issue 11 www.jetir.org (ISSN-2349-5162) JETIR2411546 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org f431 efficient, allowing spacecraft to achieve high velocities over long periods, making it ideal for deep-space missions. Propulsion System Efficiency Thrust Typical Application Limitations Chemical Low High Launch, military, aviation High fuel mass, limited duration Electrical High Low Deep-space missions Low thrust, requires high power Nuclear High Moderate-High Long-duration, deep-space Safety concerns, complex technology Hybrid Moderate-High Variable Versatile mission profiles Complexity, system integration issues © 2024 JETIR November 2024, Volume 11, Issue 11 www.jetir.org (ISSN-2349-5162) JETIR2411546 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org f434 Comparative analysis of different propulsion systems with formula and their minimum and maximum range.
[129] Advancements in Propulsion Systems for Rocket Engines: A Review — Advancements in Propulsion Systems for Rocket Engines: A Review | Tuijin Jishu/Journal of Propulsion Technology Articles Advancements in Propulsion Systems for Rocket Engines: A Review Article Sidebar Main Article Content Propulsion systems for rocket engines utilize it, emphasizing significant breakthroughs and their impact on space missions. Recent advancements in propulsion systems encompass a wide range of factors, such as propulsion techniques, engine configurations, materials, and control mechanisms. Additionally, researchers have focused their efforts on advancing reusable rocket technologies to lower launching costs and increase space availability. Recent advancements in rocket engine propulsion technologies have expanded the limits of space exploration, providing unparalleled prospects for scientific inquiry, business ventures, and global cooperation. Articles
[132] Materials and Processes for New Propulsion Systems with Reduced ... — Materials and Processes for New Propulsion Systems with Reduced Environmental Impact - NASA Technical Reports Server (NTRS) Materials and Processes for New Propulsion Systems with Reduced Environmental ImpactAeronautics research at NASA Glenn Research Center includes development, characterization and modeling of high temperature, lightweight materials and fabrication processes for aircraft propulsion systems with increased efficiency and reduced emissions, fuel burn and noise. Ceramic Matrix Composites for Turbine Components: As part of NASA's Aeronautics research, Glenn Research Center has developed Ceramic Matrix Composites for 2700 degrees Fahrenheit turbine engine applications in the next generation of ultra-efficient aircraft. Grady, Joseph (NASA Glenn Research Center Cleveland, OH, United States) Robinson, Raymond (NASA Glenn Research Center Cleveland, OH, United States) Pereira, Joseph (NASA Glenn Research Center Cleveland, OH, United States)
[133] Materials considerations for aerospace applications — Using an ICME approach (see the article in this issue by Xiong and Olson), QuesTek Innovations developed two new stainless-steel-type alloys: (1) Ferrium S53 (AMS 5992) has a minimum tensile strength of 1930 MPa, matching that of 300M, with better corrosion resistance than the latter alloy. The aft portion of the high-pressure compressor operates beyond the temperature capability of titanium alloys, and thus, nickel-based superalloys are employed, although higher-strength and higher-temperature-capable titanium alloys such as Ti-17 and Ti-6Al-2Mn-4Zr-2Sn (Ti-6-2-4-2) are used for the cooler early forward stages The temperatures in the rear stage of the high-pressure compressor in a modern engine with a high compression ratio can require cast superalloys for creep resistance and powder superalloy disks for high-temperature creep and fatigue resistance.
[134] PDF — International Journal of Frontiers in Engineering and Technology Research, 2024, 06(02), 035–044 Publication history: Received on 01 March 2024; revised on 10 April 2024; accepted on 13 April 2024 Article DOI: https://doi.org/10.53294/ijfetr.2024.6.2.0034 Abstract Electrical propulsion systems have revolutionized satellite technology by offering greater efficiency, longer mission durations, and increased maneuverability compared to traditional chemical propulsion systems. This efficiency advantage translates to reduced launch mass and cost, making electrical propulsion systems particularly attractive for small International Journal of Frontiers in Engineering and Technology Research, 2024, 06(02), 035–044 36 satellite missions and interplanetary exploration (Etukudoh et al., 2024). Exploring future prospects in electrical propulsion systems is essential for addressing the limitations of current technologies and unlocking new capabilities for satellite missions (Sahoo et al., 2020). Technical Challenges Electrical propulsion systems require efficient power generation and management solutions to supply the necessary energy for thruster operation (Ibekwe et al., 2024).
[137] Electrical propulsion systems for satellites: a review of current ... — As the demand for more capable and sustainable satellite missions grows, advancements in propulsion technology will be essential in meeting these evolving needs and pushing the boundaries of space
[138] NASA Unveils Game-Changing Electric Propulsion Technology for Future ... — NASA’s new propulsion technology enhances small spacecraft capabilities for future planetary missions and extends the operational life of existing satellites. Not only will this technology enable new types of planetary science missions, one of NASA’s commercial partners is already preparing to use it for another purpose—to extend the lifetimes of spacecraft that are already in orbit. By contrast, planetary science missions benefiting from the NASA-H71M electric propulsion system technology could operate for 15,000 hours and process over 30% of the small spacecraft’s initial mass in propellant. Collaborating with U.S. industry to find small spacecraft applications with propulsive requirements similar to future NASA planetary science missions not only supports U.S. industry in remaining a global leader in commercial space systems but creates new commercial opportunities for NASA to acquire these important technologies as planetary missions require them.
[139] Recent innovations to advance space electric propulsion technologies — The innovations in the present space propulsion technologies include enhancing the plasma control in the electric propulsion (EP) thrusters, introduction of new control mechanisms, the utilization of alternative propellants to xenon, to address the requirements of the recently emerged missions. While many types of space EP systems are mature and active in space, significant progress is still required to address the new tasks and challenges that emerged recently, such as plans for Mars and Moon exploration , building huge satellite constellations such as Starlink and OneWeb [, , ], advanced astrophysical studies including space-based gravitational wave detection systems [, , , ], precise astrophysical and astronomical measurements in space [, , ], search for life on exoplanets , and others. To enhance the efficiency of the thrusters via innovative, not yet explored physical principles and technological approaches that were recently demonstrated in labs or conceptualised for the application in space propulsion systems;
[140] The Future of International Cooperation in Space Tourism: Strategies ... — With advancements in technology making space more accessible, the global community stands at the precipice of a new era where international collaboration can lead to unprecedented opportunities for scientific advancement, economic growth, and mutual understanding. ... Key to deep space exploration is the advancement in propulsion and life
[164] The effects of chemical propulsion on the environment — The environmental impacts of both solid and liquid rocket propulsion systems are evaluated. The exhaust species and launch profile of the Space Shuttle, which injects the greatest mass of exhaust products into the atmosphere of any current system, are discussed in some detail. Model calculations predict a global stratospheric ozone reduction of
[166] Propulsion systems - Airbus — Main navigation Innovation Sustainability Safety Secondary navigation With a focus on sustainability, efficiency, and innovation, we are exploring a range of transformative engine options to reduce the environmental impact of air travel. These include open fan, hydrogen, electric and hybrid-electric propulsion systems, all of which hold the potential to reduce fuel consumption and carbon emissions compared to current propulsion technology. Airplane engines are critical to safety, operational and economic performance, and environmental efficiency. We also work closely with key stakeholders, including governments, industry partners, and research institutions, to accelerate the development of innovative propulsion technologies. Airbus is working with propulsion experts CFM on the Revolutionary Innovation for Sustainable Engines (RISE) open fan engine demonstrator. Legal navigation
[171] Advancing Hybrid-Electric Propulsion Systems for Sustainable Flight — Advancing Hybrid-Electric Propulsion Systems for Sustainable Flight - Tech Briefs Hybrid-electric propulsion systems hold clear potential to reduce aircraft carbon dioxide emissions and support the goal of greater sustainability in aviation. Hybrid-electric propulsion systems, which combine fuel-burning engines with electric motors and batteries, create opportunities to significantly improve aircraft fuel efficiency and lower carbon-dioxide emissions, while also offering potential reductions in maintenance costs. Collins Aerospace is working with sister business Pratt & Whitney Canada to advance sustainable hybrid-electric propulsion technology for the aviation industry. Hybrid-electric propulsion systems hold clear potential to reduce aircraft carbon-dioxide emissions and support the industry’s drive toward greater sustainability in aviation. Aerospace Aircraft Aviation fuels Electric aircraft Electrical systems Emissions Energy Energy Storage Energy storage systems Hybrid electric vehicles On-board energy sources Propulsion Sustainable development Vehicles
[172] Driving Sustainable Aviation: Hydrogen Propulsion's Role in Achieving ... — The aviation industry is steadfast in its commitment to achieving net-zero emissions by 2050, driving transformative advancements in propulsion technology. Hydrogen propulsion, hybrid-electric systems, and turbo-electric engines have emerged as key solutions in balancing sustainability goals with operational performance. These innovations are supported by progress in aerodynamics, digital
[173] PDF — Governments must implement constructive policy frameworks that focus on production incentives for sustainable aviation fuels (SAF) and helps to realize cost-effective new technologies that together will support the Paris Agreement objectives and secure a sustainable future for aviation. Aircraft and engine manufacturers, fuel-producing companies, airports, and air navigation services providers
[174] Sustainable aviation for a greener future | Communications Earth ... — The pathways include the adoption of sustainable aviation fuels, advancement of hydrogen and electric propulsion, optimization of air traffic management, and implementation of policies that incentivize sustainable practices. Advances in feedstock optimization through biotechnology, renewable energy integration in conversion processes, and cost-effective supply chain development are essential to scaling the deployment of sustainable aviation fuels, reducing production costs, and meeting the growing global demand for sustainable aviation solutions. Japan and the United Kingdom also target net-zero by 2050, with strategies emphasizing sustainable aviation fuels, hydrogen-powered aircraft, and optimized air traffic management. By fostering the development of cleaner propulsion systems, advanced materials, and digital solutions, aviation can contribute to a more sustainable and environmentally integrated transportation system, ensuring a cleaner and carbon-neutral future.
[198] Assessing the Environmental Impact of Naval Propulsion Systems — The environmental impact of naval propulsion has garnered increasing scrutiny in recent years, as the maritime sector plays a pivotal role in global commerce and security. Traditional ship propulsion systems, primarily reliant on fossil fuels, contribute significantly to greenhouse gas emissions and marine pollution.
[199] Environmental impact of propulsion systems and green alternatives — The environmental impact of space propulsion has been analyzed from a wide variety of viewpoints and by experts of different fields. Among all, this chapter contains a wide literature survey on the state and the perspectives of two specific topics: the interaction of combustion products with the atmosphere and the toxicity of propellants as well as of their reaction products.
[200] Environmental Impacts of Future Aviation Propulsion Systems — Specifically, this thesis addresses aspects of 1) aerosol formation from aviation-attributable NOx and SOx, 2) the technical extent to which the air quality and climate impacts of aviation can be minimized, and 3) how propulsion system design for supersonic commercial aircraft in the future would impact the environment.
[201] Sustainable aviation for a greener future - Communications Earth ... — The pathways include the adoption of sustainable aviation fuels, advancement of hydrogen and electric propulsion, optimization of air traffic management, and implementation of policies that incentivize sustainable practices. Advances in feedstock optimization through biotechnology, renewable energy integration in conversion processes, and cost-effective supply chain development are essential to scaling the deployment of sustainable aviation fuels, reducing production costs, and meeting the growing global demand for sustainable aviation solutions. Japan and the United Kingdom also target net-zero by 2050, with strategies emphasizing sustainable aviation fuels, hydrogen-powered aircraft, and optimized air traffic management. By fostering the development of cleaner propulsion systems, advanced materials, and digital solutions, aviation can contribute to a more sustainable and environmentally integrated transportation system, ensuring a cleaner and carbon-neutral future.
[202] The origin, fate, and health effects of combustion by-products: a ... — Abstract. Incomplete combustion processes can emit organic pollutants, metals, and fine particles. Combustion by-products represent global human and environmental health challenges that are relevant not only in heavily industrialized nations, but also in developing nations where up to 90% of rural households rely on unprocessed biomass fuels for cooking, warmth, and light.
[210] Electric Propulsion Systems: Design and Applications — Electric propulsion systems represent a significant advancement in propulsion technology, particularly in a world increasingly focused on sustainability and efficiency. In summary, electric propulsion systems mark a transformative approach in aerospace technology, promising enhanced efficiency, reduced environmental footprints, and practical applications across a range of industries. "Electric propulsion systems have the potential not only to transform how we explore space but also to significantly alter our approach to sustainable transportation on Earth." High Efficiency: They utilize electricity effectively, often providing better performance than traditional propulsion systems. As the demand for sustainable and efficient technologies rises, electric propulsion systems will continue to play a central role in addressing global challenges such as climate change and resource depletion.
[213] How Government Policies on Electric Vehicles Are Driving the Future of ... — As the world shifts toward sustainable transportation, government policies on electric vehicles (EVs) play a crucial role in shaping the future of mobility. I've seen firsthand how these policies can accelerate EV adoption, drive innovation, and ultimately reduce greenhouse gas emissions. From tax incentives to infrastructure investments, governments are taking bold steps to encourage both
[214] PDF — The scope of these policies varies across countries, and so does the actual adoption of EVs (Figure 2). In Australia, Japan, Mexico and most U.S. states, the number of electric cars put on the road remains very low. Conversely, there is a notable enthusiasm among car buyers in nations such as in Norway, where electric vehicles
[215] PDF — This report provides an overview of the current state and potential future development of aviation electrification. To understand the types of research questions about current and future challenges for this emerging sector, we consider a case study of the potential deployment of small commercial electric aircraft for existing underserved markets and we consider operational requirements and technical challenges as well as the range of questions about charging infrastructure, grid integration, policy and regulatory requirements, and emissions impacts that will need to be addressed. The case study also outlines potential nearer-term solutions and research areas of interest that will need to be addressed in the longer term at much larger scales, and it highlights the National Renewable Energy Laboratory’s capabilities for addressing these challenges with a variety of stakeholders. This case study illustrates some of the challenges associated with electrifying aviation on a small scale by focusing on four regional markets with service to Denver International Airport (DEN).
[216] Powering the Future: The Impact of Battery Technology on Electric ... — Battery technology is a critical factor influencing the performance and future of electric vehicles (EVs). Advances in battery systems have significantly enhanced key aspects such as range, charging speed, longevity, and overall efficiency, making EVs more attractive compared to traditional gasoline-powered vehicles. High energy density in modern batteries allows for longer distances on a
[217] Innovations in Battery Technologies of Electric Vehicle: A Review — This paper explores the transformative impact of Electric Vehicles (EVs) on the automotive industry. It highlights the rapid expansion of the EV market worldwide, driven by increased options, reduced pricing, and advancements in battery technology. The significant progress made since the inception of EVs, this paper highlights the need for further research into optimizing battery designs for
[218] Unveiling the determinants of battery electric vehicle performance: A ... — As electric vehicles reach the end of their designed lifespan, battery performance degradation and increased maintenance costs inevitably lead to their market exit. During this process, considerations such as how to handle batteries and other critical components to minimize environmental impact and ensure the maximum recovery and reuse of
[225] How is rocket propulsion different from jet propulsion? — The main difference between jet propulsion and rocket propulsion is that in rocket propulsion the oxidizer is carried with the vehicle, but jet propulsion the oxidizer is the oxygen in the air sucked into the engine of the plane. Because there is no oxidizer in space, rockets need to carry their own oxidizers with them.
[226] Jet Engine vs. Rocket Engine - What's the Difference? | This vs. That — Jet Engine vs. Rocket Engine What's the Difference? Jet engines and rocket engines are both types of propulsion systems used in aircraft and spacecraft. However, they differ in their working principles and applications. Jet engines rely on the intake of air, which is compressed and mixed with fuel before being ignited.
[230] Innovations and Challenges in Hybrid Electric Vehicles: Design, Control ... — Innovations and Challenges in Hybrid Electric Vehicles: Design, Control Systems, Batteries, and Thermal Management - TechBullion Innovations and Challenges in Hybrid Electric Vehicles: Design, Control Systems, Batteries, and Thermal Management Hybrid electric vehicles (HEVs) are designed to integrate two primary types of propulsion systems: a conventional internal combustion engine (ICE) and one or more electric motors powered by batteries. Related Items:Advanced Cooling Systems, batteries, Battery Management Systems, Control Systems, Design, Electric Propulsion, Electric Vehicle Infrastructure, Electrification Trends, Emissions Reduction, Energy Efficiency, Energy Storage, Environmental Impact, Fuel Economy, HEVs, Hybrid Electric Vehicles, Hybrid System Design, Hybrid Vehicle Challenges, Internal Combustion Engine, Lithium-ion Batteries, Nickel-Metal Hydride Batteries, Optimization-Based Control, Power Electronics Controller, Refrigerant-Based Cooling, Regenerative Braking, Rule-Based Control, Thermal Management, Vehicle Sustainability
[231] Engineering Opportunities and Challenges for eVTOLs | Alton Aviation ... — eVTOL Design Complexities and Opportunities Electric Vertical Takeoff and Landing (eVTOL) aircraft represent a promising leap in urban air mobility, offering solutions to congestion and transportation inefficiencies. However, their development presents significant engineering challenges. These challenges include designing efficient propulsion systems, ensuring battery reliability and longevity
[232] Electric vs. Traditional Propulsion: A Comparative Analysis in Aircraft — Electric propulsion refers to the use of electric motors and associated systems to propel aircraft, providing an alternative to traditional propulsion methods that rely on internal combustion engines.
[239] AI-Integrated Mechanical Engineering Solutions for Next-Gen Rocket ... — This abstract explores the transformative impact of AI in the development and optimization of rocket propulsion technologies, highlighting its potential to revolutionize the aerospace industry. AI-powered mechanical engineering solutions have emerged as a game-changer in the design and manufacturing of rocket propulsion systems.
[240] Multi-objective multidisciplinary design optimization of liquid ... — The design of liquid-propellant engines (LPEs) has several challenges in setting the performance parameters. Accordingly, optimizing the design of a thrust chamber is of considerable importance that has been considered in several research projects. Previous research has focused on multidisciplinary design optimization (MDO).
[241] PDF — Metal Additive Manufacturing (AM) can provide significant advantages for lead time and cost over traditional manufacturing for rocket engines. Lead times reduced by 2-10x Cost reduced by more than 50% Complexity is inherent in liquid rocket engines and AM provides new design and performance opportunities.
[249] Promising Technologies in Propulsion and Power - Future Propulsion ... — The promising propulsion technologies include advanced core ultra-high bypass-turbofan engine, multi-combustor, multifuel propulsion systems (using kerosene and cryogenic fuel), wave rotor topping cycle, intercooled and recuperated turbofan engines, pulse detonation engine, i.e. tapping into the unsteadiness as a means of harvesting energy.
[250] Hydrogen propulsion systems for aircraft, a review on recent advances ... — A comprehensive overview of the hydrogen propulsion systems in aviation is presented with an emphasis on the technical aspects crucial for creating a more sustainable and efficient air transportation sector. ... The challenges for H 2 application in aviation and the future perspective are discussed in section four where on-board H 2 storage
[251] Perspectives on the success of electric propulsion — Electric propulsion is now in both widespread use and active flight-implementation across a broad spectrum of commercial and government applications ranging from cubesats, LEO constellations, GEO comsats, deep space science missions, and even the human-tended Lunar Gateway. It has been my good fortune to witness, and even participate in, to some small extent, the transition of electric
[252] High-Efficiency Megawatt Motor (HEMM) - NASA — Overview. The 1.4-megawatt (MW) High-Efficiency Megawatt Motor (HEMM) is being designed to meet the needs of electrified aircraft propulsion. ... (HEMM) components for future electrified aircraft propulsion. Motor Comparisons. The HEMM motor is extremely powerful and efficient for its given size (16 inches by 42 inches). Though smaller than an
[254] Infrastructure planning for airport microgrid integrated with electric ... — It is becoming increasingly evident that electric propulsion systems are the future of aviation, with further electrification of aircraft anticipated . In this context, previous studies have focused on designing efficient charging systems as a crucial aspect of integrating EA into commercial airports.
[255] PDF — This report provides an overview of the current state and potential future development of aviation electrification. To understand the types of research questions about current and future challenges for this emerging sector, we consider a case study of the potential deployment of small commercial electric aircraft for existing underserved markets and we consider operational requirements and technical challenges as well as the range of questions about charging infrastructure, grid integration, policy and regulatory requirements, and emissions impacts that will need to be addressed. The case study also outlines potential nearer-term solutions and research areas of interest that will need to be addressed in the longer term at much larger scales, and it highlights the National Renewable Energy Laboratory’s capabilities for addressing these challenges with a variety of stakeholders. This case study illustrates some of the challenges associated with electrifying aviation on a small scale by focusing on four regional markets with service to Denver International Airport (DEN).
[266] EcoPulse: A Glimpse into the Future of Hybrid-Electric Aviation — The aviation industry is constantly evolving, and the EcoPulse project is a clear example of how technological innovation is driving a more sustainable and efficient future.This demonstrator, a distributed hybrid propulsion aircraft, was jointly developed by Airbus, Daher, and Safran—three giants in the aerospace industry.
[268] Hybrid and electric flight - Airbus — Hybrid and electric flight Electric and hybrid-electric propulsion is rapidly revolutionising mobility technologies across industries, from automotive and aerospace to rail and marine. Promising propulsion concepts are being further developed, such as hybrid powered aircraft or hydrogen fuel cells. In June 2023, Airbus and STMicroelectronics signed an agreement to advance research on the next generation of semiconductors, which are a key enabler of the aerospace industry’s transition to hybrid and fully electric aircraft like the ZEROe demonstrator or the CityAirbus NextGen. Hybrid-electric aircraft propulsion Hybrid-electric propulsion leads to better energy management, reducing fuel consumption by up to 5% compared to a standard flight. Hybrid-electric propulsion is an incremental step that can improve the energy efficiency of every aircraft class.