二维超声速混合层流动稳定性的数值分析与并行计算

Numerical analyses and parallel computation of two-dimensional supersonic mixing flow

本文用DNS方法对两股空气的二维超声速混合流动 (Mc=0 .5 )的稳定性问题进行了计算模拟。通过对采集的流动参数在时空两个方面进行的分析 ,发现流动失稳后出现了间歇结构。有限差分计算采用了并行计算技术 ,在微机并行环境下可高效率地完成大规模计算任务。

In this paper, the stability problem of a two dimensional supersonic mixing flow (M c=0.5) of two air streams is solved with DNS method. The computational results are analyzed, and the strong nonlinear instability of the flow field is noticeable. The intermittent structure in the mixing layer is observed when the instability develops. The parallel computational technique is applied on the finite difference computation, which is based on a PC cluster with PVM.