关键词: 计算流体力学, 外挂物投放, 非结构重叠网格, 非定常流动, 欧拉方程

Abstract:

A new dynamic unstructured overset grid method is developed. The neighbor-to-neighbor search algorithm based on advancing front is developed to enhance the searching efficiency. The redefinition of inter-grid boundary satisfies high order spatial accuracy. Unsteady Euler equations are solved on unstructured overset grid by an explicit dual time-stepping, finite volume, upwind method. Numerical results show that unstructured overset grid method can more conveniently simulate the problems of the unsteady or/and complex multi-body in relative motion.

Key words: CFD,  , store , separation,  , unstructured , overset , grid,  , unsteady , flow,  , Euler , equation