Propeller aerodynamics is the specialized field within fluid mechanics and aerospace engineering that investigates the interaction between rotating propeller blades and the surrounding fluid medium, typically air. This discipline analyzes the generation of thrust and torque, examines complex flow phenomena such as induced velocities, tip vortices, and compressibility effects, and applies principles of airfoil theory and momentum exchange to optimize propulsion efficiency, minimize noise, and inform the design and performance prediction of propellers across diverse applications.