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本文针对一平面激波S绕过坡角为30°的山峰后与地面作用所产生的波系图案等问题,通过激波管光测模型实验手段进行了分析和研究。实验是在入射激波马赫数Μ_i=1.18,1.32,1.74,2.00和2.29等五种条件下进行的。实验结果表明,在入射激波S和反射激波R之间出现了一接触面C,并与Skews关于平面激波绕凸角壁面时所得到的结果做了比较。与此同时,从我们所拍摄的纹影流场照片上可以看出,平面激波S绕过30°山峰后与地面作用所产生的反射波均属于马赫反射的范围。
In this paper, we analyze and study the shock wave tube model of a shock wave tube by solving the problem of wave pattern generated by the action of a plane shock wave S after the peak angle of 30 ° and the ground surface. The experiments were carried out under five conditions: incident Mach Mach number Μ_i = 1.18, 1.32, 1.74, 2.00 and 2.29. Experimental results show that there is a contact surface C between incident shock S and reflected shock R, which is compared with Skews’ results when plane shock waves are around the convex wall. At the same time, we can see from the pictures of the flow field of the shadow film that the reflection wave generated by the plane shock wave S and the ground after passing around the 30 ° peak belongs to the Mach range.