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为了研究凹面腔内二维激波会聚的特性,设计、建立了二维激波会聚冷态实验系统,进行了二维激波会聚冷态实验,结果表明:当射流入口宽度增大时,相同射流入射压力下,喷入凹面腔内的射流强度增大,导致凹面腔内的激波会聚强度增强,从而压力脉动幅值增大,频率也随之增大。数值模拟了二维冷态激波会聚过程,从模拟结果中的压力和频率上看,模拟结果与实验结果基本上是吻合的。
In order to study the characteristics of two-dimensional shock convergence in a concave cavity, a two-dimensional shock converging cold state experimental system was established and a two-dimensional shock converging cold state experiment was carried out. The results show that when the width of the jet inlet is increased, Under the incident jet pressure, the intensity of the jet injected into the concave cavity increases, resulting in the increase of the intensity of the shock wave in the concave cavity. As a result, the amplitude of the pressure pulsation increases and the frequency increases. Numerical simulation of two-dimensional cold shock wave convergence process, simulation results from the pressure and frequency point of view, the simulation results and experimental results are basically consistent.