Rotating Detonation in High-speed Combustible Flows Using A ShockTunnel

对旋转爆震波的起爆和传播进行了实验研究。在激波隧道中，反射激波后的测试气体通过孔板进入环形燃烧室，以澄清旋转爆震波稳定传播的条件。通过改变孔板上的压力比，发现压力比为7.5时实现了旋转爆轰，而压力比为2.5时则导致了回闪。本研究阐明了旋转爆震波起爆稳定条件所需的压力比。

An experimental study has been made on initiation and propagation of rotating detonation waves. A test gas behind a reflected shock wave in a shock tunnel flows into an annular combustion chamber through an orifice plate to clarify conditions of steady propagation of rotating detonation waves. By varying the pressure ratio across the orifice plate, it is found that rotating detonation is achieved for the pressure ratio of 7.5, whereas the pressure ratio of 2.5 results in flash-back. The present study clarifies the pressure ratio needed for stable condition for initiation of rotating detonation waves.