二维分离流中的NS方程数值计算方法

Numerical Calculation of 2-D Navier-Stokes Equation at Separated Flow

本文采用显式多步龙格－库塔方法求解了二维可压非定常完全ＮＳ方程，为了使计算适用于一股的网格，采用了有限体积法进行几何离散。研究了定常问题计算中的一些加速收敛措施，如：当地时间步长、残值光顺技术等。讨论了模拟分离流问题中的技术问题，计算结果表明本文的计算结果与国外文献是吻合的。

In this paper, the governing equations are the unsteady,2-D compressible laminar Navier-Stokes equations.The explicit mul-tistage time-stepping scheme is adopted in this computation. Flexibilityin treating arbitrary geometries is obtained with a finite volume formula-tion. The accelerating convergence tecchnique,local time step andimplicit residural smoothing are investigated.The results of this paperare shown good agreement with other numerical methods and experi-ments.