超声速平面混合层小激波的形成与演变

为了揭示超声速混合层中小激波形成机理及其与涡相互作用的演变过程,本文基于大涡模拟（LES）方法,结合五阶精度混合TCD／WENO格式,对超声速平面混合层在对流马赫数为Mc=0．65条件下的流场结构进行了数值模拟,数值结果详细描述了超声速混合层中小激波的形成过程。研究了小激波形成后,随涡运动而产生的变形、脱落及发展过程。同时,对混合层双涡合并过程中,小激波与相邻涡相互作用所产生的变形与演变过程进行了讨论。

The generation and evolution of shocklets in a supersonic plane mixing layer

To reveal the generation mechanism of shocklet and its interaction process with the vortexes in a supersonic mixing layer.In this paper,the dynamics flow field of supersonic plane mixing layer has been simulated at a convective Mach number of Mc=0.65,based on the large-eddy simulation,combined with the high resolution 5^th order hybrid TCD/WENO scheme.Our numerical results described in detail the generation process of shocklets in a local supersonic area of the supersonic mixing layer.The deformation,shedding and development of shocklets accompanied with the moving of vortexes after their production have been investigated.Moreover,we discussed the deformation and evolution processes of the shocklets of their interaction with neighbor vortexes during the vortex pairing.