网格嵌套法在复杂流场计算中的应用

Use of Chemera Gridembedding Technique in ComplexConfiguration Flowfield Calculation

研究了机翼机身组合体带有外挂物如导弹、短舱等的流场特性。在计算中，机翼机身作为整体生成网格，外挂物单独生成网格。用多块网格法建立两套网格的重叠区，作为两个流场子域计算交换流场信息的嵌套边界。文中翼身组合体流场计算的控制方程用欧拉方程。用有限体积法离散方程，用显式龙格库塔时间步进法计算离散化方程。同时，文中还探讨了不同子域用不同控制方程以及采用不同离散格式，如分别用顶点格式和结点格式时，所需作的特殊处理。

A chemera gridembedding technique is used to calculate the flowfield of wingbodystore configuration in this paper.The overlap region is made of the grids genarated for wingbody and store respectively.Different equations and different discretization methods such as cell vertex or cell center finite volume method used in different subdomains have been developed in this paper.