抽吸激波管的性能分析与计算

为了减小由于反射激波和透射激波分叉引起的反射型激波风洞试验气体提前受到污染的现象,本文研究了一种新的具有抽吸的激波管流动,分析了抽吸缝的作用,给出了这种抽吸激波管性能参数的计算方法,同时还给出了反射激波与边界层相互作用引起的激波分叉的形状随抽吸量变化的计算公式。实验证实了边界层抽吸可以有效地减小激波与壁面边界层相互作用所产生的分离现象。计算与测量结果是一致的。

ANALYSIS AND CALCULATION OF A SHOCK TUBE WITH SUCTION

In order to reduce the early contamination of the test gas in a shock tube, caused by reflected and transmitted shock bifurcation, a novel shock tube of utilizing suction through slots in its walls has been investigated in this paper. In the case of suction, the function of the slots is discussed, the calculating methods of the performance parameters are given and the shape of the shock bifurcation due to interaction between the shock wave and boundary layer is described. It has been confirmed by experiments that the boundary layer suction can efficiently eliminate the separation due to interaction of a reflected shock wave with the wall boundary layer. Measurements with suction are in good agreement with the theory.