关于平面激波在凹两段楔面上的传播

众所周知,当一平面激波同任意形状的障碍物相互作用时,将产生十分复杂的波系,其中激波在曲面壁上的绕射和反射,将产生非定常波系。关于平面激波在凹圆柱壁面上的传播,我们可以用一连串、长度为无限小的楔面所构成的多边形来近似和代替凹圆柱面,因此分析和研究激波在两段楔面上反射和绕射的目的在于得出激波在圆柱壁面以及其它较复杂形状壁面上的传播规律。本文采用马赫-曾德干涉仪在激波管上进行光测模型实验。根据所拍摄的流场干涉图像,以分析其波系的演变过程及传播规律,得到有关流场的密度分布和压力分布,更为重要的是给出流场参数的定量结果。

The Propagation of a Plane Shock Waves Over a Concave Double Wedge

It is well known that the reflection and diffraction of shock waves by curved surface are very complex, due to the presence of a length scale and the absence of self-similarity, In contrast to reflection by a wedge, the interaction is completely unsteady. The purpose of this paper is to show the propagation of a plane shock waves over a concave double wedge. By means of Mach-Zehnder interferometer, the interferogram of flow field as well as distribution of density, was obtained. This is very useful for the reliable and complete understanding of the process of moving shock waves.