激波绕流与激波碰撞的数值模拟

本文应用基于Poe平均构造的最小耗散的扩散与反扩散守恒差分格式，数值模拟单激波绕流三我形障碍物，及等强度激波碰撞和不等强度激波碰撞的二维非定常复杂流场。计算结果表明，该格式具有很高的单波精度及较好的激波与接触间断分辨度，可直接用于复杂流场的数值模拟。

Numeric8l Simulation of Shock Diffraction and Shock Collision over a Triangular Obstacle

With a new least dissipation-correction difference schemebased on Roe's average, the two dimensional unsteady flow field of thediffraction of a singular planar shock wave over a triangular obstacle,and the collisions of two same and different strength of planar shockwaves over the same obstacle are simulated in this paper.The numericalresults show that this scheme have high accuracy of the rarefaction wave,and better resolution of the shock waves and contact discontinuity,so thatthe difference scheme can be used directly to investigate various complexflow field.