脉冲爆震发动机不同副室的快起爆过程数值模拟

Numerical Simulation for Shock to Detonation Transition of Pulse Detonation Engine with Different Sub-chamber

爆震波的有效起爆是目前脉冲爆震发动机能否工作的关键。分别针对三种不同副室结构的爆震管,通过二维数值模拟研究了脉冲爆震发动机的起爆过程。研究表明:(1)电火花塞的能量不足以直接点燃爆震波,爆震波是在经历了一系列激波和反射激波以及与火焰阵面的相互耦合作用后最终建立的。(2)由于副室结构不同,激波向爆震波转捩时间也不同,将三种情况下的模拟结果进行对比,得出了SDT时间距离最短的最佳副室结构。

The effective producing detonation is an essential technology of pulse detonation engine.The deflagration to detonation transition progress of pulse detonation engine was researched using two-dimensional numerical simulation aimed at detonation engine tube with three different sub-chamber structures.Studies indicate that：（1）the energy of electric sparks is too weak to directly trigger a detonation;the detonation is fully established through a series of interactions and impacts of reflected shock waves.（2）Be...