喷管内横流流场的数值模拟

采用显式的原始ＭａｃＣｏｒｍａｃｋ时间分裂格式和改进的ＴＶＤ ＭａｃＣｏｒｍａｃｋ格式分别求解了二维轴对称喷管内横流流场的Ｎ－Ｓ方，得到了与理论分析结果相近似的流场结果图谱，并对以上两方法得到的结果进行了比较，结果表明：ＴＶＤ的方法具有更高的精度。文中还介绍了一种基于ＴＴＭ方法的改进的网格生成方法，用于生成贴壁性和正交性都比较好的网格，实现了完全由边界网点分布来确定内部网格点的分布。

Numerical Simulation of Cross-Flow in Rocket Motor Nozzle

A time-split MacCormack scheme and a TVD MacCormack scheme are used to solve the twodimensional axisymetric N-S equations of Cross-flow in rocket motor nozzle. Both the methods give fine results and the TVD scheme is proved to be of more higher accuracy. A kind of grid generation method based on the TTM method is also introduced to generate body-fitted calculating mesh, the distribution of inner grids can be totally controled by the distribution of grids on boundaries.