平面激波绕矩形障碍物后的绕射与反射

Diffraction and Reflection of a Plane Shock Wave Diffracting a Rectangular Obstruction

本文通过激波管二维光测模型实验和采用矩形网格的FLIC方法进行数值计算两种手段针对平面激波绕矩形障碍物后的绕射与反射的问题进行了分析和研究。文中给出了绕射波的波形以及平面激波绕过矩形障碍物后与地面相互作用而产生的从规则反射到马赫反射的波系图案。本文考虑了入射激波马赫数M_i及不同矩形障碍物高度H的影响,并将二维光测模型实验同数值计算的结果进行了比较。

The question concerning the diffraction and reflection of a plane shock wave diffracting a rectangular obstruction was studied and analysed by means of optical experiment on the shock tube and numeri-cal method of FLIC type with rectangular mesh. This paper presents the results which are the form of diffracting shock wave and the shape of regular reflection and Mach refraction on shock tube, when a plane shock wave diffracted around a rectangular obstruction. The influences of Mach number Mi of the incident shock wave and the height of rectangular obstruction have been considered. The numerical results were compared with the results of optical experiment. It should be mentioned that the numerical method of FLIC is very useful and successful.