汽油/空气两相脉冲爆震发动机触发爆震的研究

有效的触发爆震波是脉冲爆震发动机正常工作的关键所在。为了在多循环两相脉冲爆震发动机的缓燃到爆震转变过程中,有效的控制激波反射,成功的触发爆震。通过在爆震室内合理的排放障碍物来促进激波与火焰的相互作用,组织激波反射,适时的触发爆震,从而有效地缩短促发爆震的距离,并最终获得充分发展的爆震波。试验发现爆震管内同样的障碍物在不同的位置起到的作用不同。在直径58 mm,长度1275 mm的汽油/空气PDE爆震管内成功触发频率为50 Hz的爆震。 

Experimental research on detonation initiation of gasoline/air two-phase pulse detonation engine

Efficient initiation of detonation waves is the key to the pulse detonation engine(AB.PDE) operation.In the process of deflagration to detonation transition(AB.DDT),detonation waves were successfully triggered by controlling the shock wave reflection.Interaction between flame and shock is strengthened by putting obstacles in detonation chamber with reasonable arrangement,which can efficiently organize reflection of shock wave and initiate detonation timely.Thus,DDT distance was shortened comparatively.Gasoline/Air detonation waves propagate successfully in the combustor.These results are valuable to the investigation on DDT process of two-phase pulse detonation engine at high frequency.