基于高阶谱差分和嵌套网格方法的三维无粘流动数值模拟

Spectral Difference Method and Chimera Grids for 3D Inviscid Flow

数值方法采用高阶谱差分格式,单元边界上的通量采用基于Roe格式的近似黎曼解,在嵌套网格上求解三维Euler方程.嵌套边界上使用了一种高阶紧致的插值格式.对三维亚音速定常无粘流动进行数值模拟,使用嵌套网格与单块网格得到的计算结果吻合很好.

High-order spectral difference method is combined with the overset grid technique to solve three dimensional Euler equations. A new high-order compact interpolation scheme is developed for overset boundary treatment. Numerical simulation for three dimensional inviscid subsonic flow over a wing shows that results computed using overset grids agree very well with the results of using single block grid.