Abstract The process of starting the rotating detonation engine initially filled with air in low outer pressure conditions was studied. Such engines can be used for bringing satellites into the Earth orbit. A three-dimensional numerical simulation of an engine combustion chamber with a rotating detonation wave of a cylindrical type with an internal body fed by a hydrogen-oxygen mixture or an acetylene-oxygen mixture was performed. The influence of the lengths of the combustion chamber channel on the stability of the detonation wave and thrust characteristics was considered. An author's computer code was used in simulations, the code was based on a model of multicomponent gas dynamics with chemical transformations and turbulence. The code was tested by comparing it with experiments and analytical solutions for simple cases. To describe the kinetics of acetylene combustion, a simplified chemical scheme of interaction of 10 components was used, without “heavy” radical species: [C2H2, CO, CO2, H2, O2, H2O, OH, O, H, N2]. The influence of the chosen kinetic mechanism in case of hydrogen-oxygen mixture on the simulation results was studied. Various modes of the process in the detonation engine were obtained, including those with a stable detonation wave.
Highlights Under low external pressure conditions, the detonation engine starting was investigated. A simulation of an engine powered by acetylene oxygen was carried out. The influence of the fuel concentration on the processes in the chamber is studied. Combustion chambers of two lengths are considered. Traction characteristics were obtained and analyzed for all cases.
Safety of a rotating detonation engine fed by acetylene – oxygen mixture launching stage
Acta Astronautica ; 194 ; 496-503
2021-11-27
8 pages
Article (Journal)
Electronic Resource
English
Detonation engine fed by acetylene–oxygen mixture
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