Continuous Spin Detonations

TLDR

Continuous detonation involves specific flow structures, existence conditions, and basic properties. The study aims to analyze the parameters that determine spin detonation. The authors focus on physical, chemical, and geometric factors in their analysis. Results show controlled continuous spin detonation of various fuels in liquid‑propellant rocket motors and ramjet combustors, with stable transverse detonation wave velocity and structure across a wide range of propellant ratios and pressures, and determine the existence range as a function of governing parameters.

Abstract

Results on controlled continuous spin detonation of various fuels in liquid-propellant rocket motors and ramjet combustors are reported. Schemes of chambers, combustion in transverse detonation waves, and typical photographic records of transverse detonation waves are given. The flow structure, existence conditions, and basic properties of continuous detonation are considered. An analysis of physical, chemical, and geometric parameters determining spin detonation is presented. Results of studying continuous spin detonation of C 2 H 2 + air and H 2 + air mixtures in an annular ducted chamber 30.6 cm in diameter are reported. The range of existence of continuous spin detonation in fuel-air mixtures is determined as a function of the governing parameters. In the case of high-quality mixing, the transverse detonation wave velocity and structure are extremely stable in a wide range of the ratios of propellant components and in the examined range of pressures in the chamber.