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应用CE/SE方法对带锥形扩张喷管的气液两相脉冲爆轰发动机的爆轰波在管内传播过程和排气过程进行了数值计算。分析了锥形扩张喷管对两相脉冲爆轰发动机内流场和性能的影响。数值模拟结果表明:爆轰波在锥形扩张喷管中压力峰值比在爆轰管中小;锥形扩张喷管内气流在排气的大部分时间保持超音速;锥形扩张喷管加速了发动机的排气过程,为提高发动机频率提供条件;脉冲爆轰发动机带锥形扩张喷管时的冲量比带直喷管和不带喷管时大。研究成果对脉冲爆轰发动机喷管设计具有重要理论指导作用。
The propagation of the detonation wave in a gas-liquid two-phase pulse detonation engine with conical expansion nozzle was numerically calculated by CE / SE method. The influence of conical expansion nozzle on the flow field and performance in two-phase pulse detonation engine is analyzed. The numerical simulation results show that the peak pressure of detonation wave in the conical expansion nozzle is smaller than that in the detonation tube; the airflow in the conical expansion nozzle stays supersonic for most of the exhaust time; the conical expansion nozzle accelerates the acceleration of the engine Exhausting process, to improve the frequency of the engine to provide conditions; Impulse detonation engine with conical expansion nozzle impulse than with straight nozzle and nozzle without large. The research results have important theoretical guidance on the design of the pulse detonation engine nozzle.