带喷管脉冲爆震发动机单循环性能分析模型

A Single-Cycle Performance Model of the Pulse Detonation Engine with Nozzle

利用特征线理论下爆震波传播过程的解析解形式,采用爆震室内气体状态均一化处理方法,将爆震波到达爆震室出口或隔离气体接触面(部分充填下)以后通过收敛扩张喷管的排气过程简化为固定容积排气的零维模型,在此基础上得到了相应的性能计算模型。通过与试验数据的对比表明,模型可以有效评估喷管结构尺寸对发动机性能的影响趋势,通过引入一定的拟合形式,可以计算同一发动机结构下不同状态时的性能。

A performance analysis model of pulse detonation engine with convergent-divergent nozzle was established. By using detonation transmission analytical solution of characteristic method and processing method of homogeneous state of detonation chamber ,the exhaust process through the nozzle after the detonation wave arriving the exit of detonation chamber or the contact face of purge gas was simplified to a fixed exhaust volume zero dimensional model. Compared with the experimental data, the model developed can be used for evaluating the engine performance trend of different nozzle sizes. Through applying some curve fitting ,the model can be used for calculating the engine performance at different regimes.