摘要
运动激波在波前同向气流中传播时与壁面附近边界层发生的相互作用，既不同于定常的激波边界层干扰，也与普通激波管中端壁反射激波与边界层的作用有很大差异。通过实验和数值模拟对这一问题进行研究表明，激波与边界层作用后，波面在壁面附近发生了明显弯曲，且触及壁面；弯曲的激波与壁面进一步作用后发生反射，由于波前气流速度不同，这种反射存在规则反射和马赫反射两种类型；由于激波反射，波后壁面附近形成了一个高压区；激波与边界层作用后，波后边界层内出现了一系列高低压区相间的流场结构。
：When a moving shock wave propagates in a flow field which has the same flow direction，it will interact with the boundary layer in near wall region. I t was found that such an interaction is different from both the steady shock wav eboundary layer interaction and the unsteady nearwall interaction of a refle ct ed shock wave at the end of a shock tube. Experimental and numerical results sho wed that after the interaction, the shock wave bent backward in the near wall re gion and can reach the wall. The bent shock wave is reflected at the wall. As th e flow speed changes, two kinds of shock reflection have been observed. Due to t h e reflection, a high pressure region is generated in the region near the wall. A serial of pressure increase and decrease regions were found in the boundary lay er after the shock wave.
出处
《流体力学实验与测量》
CSCD
2000年第3期32-36,41,共6页
Experiments and Measurements in Fluid Mechanics
基金
教育部博士点基金
关键词
激波边界层干扰
双驱动激波管
数值模拟
shock/boundary layer interaction；double driver shock tube；numerical simulation
