引射器喉部面积比对脉冲爆震发动机性能的影响

Effect of Ejector Throat Area Ratio on Pulse Detonation Engine Performance

以氢气和氧气混合物为例,采用数值计算方法,通过对加装收敛扩张型引射器的脉冲爆震发动机性能进行数值模拟,获得了不同引射器喉部面积比对脉冲爆震发动机性能的影响规律。计算结果表明:引射器喉部面积比越小时,冲量增推比越大;而引射2次流率却随面积比的减小而减小。

Taking hydrogen-oxygen mixture for example,the pulse detonation engine（PDE） with converging-diverging ejector was simulated numerically.The rule of different ejector throat area ratio influence on PDE performance was obtained.The results indicate that the more impulse augmentation ratio the less the throat area ratio,mass flow rate of secondary stream decreases with the throat area ratio.