关键词: 非结构网格, Euler方程, 自适应网格技术, 迎风格式

Abstract:

The 3D Euler solutions for adaptive tetrahedral grids are presented. Spatial discretization is accomplished by a cell-centered finite-volume formulation using AUSM + upwind scheme. Higher-order accuracy is achieved by applying a novel cell reconstruction processing which avoids solution oscillations without adding explicit limiters. Unstructured grids on the surface block are created by using a new developed algorithm presented in this paper. An adaptive grid algorithm is used in order to enhance the calculation efficiency. Numerical examples include transonic flow around ONERA M6 wing and supersonic flow over Sparrow Ⅲ missile. Comparisons with experimental data are made to evaluate the accuracy and efficiency of the present method.

Key words: unstructured grid, Euler equation, adap tive grid technique, upw ind scheme