Experimental Investigation on Continuous Supersonic Jet Collision

In order to investigate the mechanism of continuous supersonic jet collision for 2-stage Pulse Detonation Engine, the experiment on continuous supersonic jet collision in free space was performed, the mechanism of continuous supersonic jet collision was uncovered through the analysis of flow field in the shadow, dynamic pressure and radiation noise. The results indicate that the see-saw pulsation mode, the swing mode and the arch twist mode occur when the continuous supersonic jet collides in free space. The pressure amplitude is bigger and periodic caused by see-saw pulsation mode while the pressure amplitude is smaller and random caused by swing mode and arch twist mode. The noise frequency caused by supersonic jet collision is lower than the pressure pulsation frequency of sound source.