关键词: 旋转爆震波发动机;解耦方法;起爆过程;性能分析

Abstract: An improved uncoupled solver of non-equilibrium flow was used to split the Euler equations for a reacting flow.Inviscid flux was calculated with fifth-order WENO scheme.Simplified implicit formulation was adopted to deal with the stiffness generated by the chemical reacting source term of species equations.Time integration was performed with two-order TVD Runge-Kutta scheme.Flow field of H2/Air rotating detonation wave engine was calculated.The initiation processes of rotating detonation at different engine size were analyzed particularly.When the diameter of engine is less than the critical size,we could not get a rotating detonation wave.Calculated flow field and the inclination of rotating detonation wave were detailed.The rotating velocity nearly equals the C-J speed.Performance analysis indicates that when the injection pressure is less than the chamber pressure,propellant could also be injected into combustor successfully.Although there is no nozzle after the straight combustor,the specific impulse of engine reaches 176.5s.

Key words: Rotating detonation wave engine;Uncoupled non-equilibrium method;Detonation initiation;Performance analysis