网格分区构筑中区域边界的隐式处理方法

A METHOD DEALING WITH ZONAL BOUNDARIES IMPLICITLY IN GRID GENERATION WITH DECOMPOSITION OF COMPUTATIONAL DOMAIN

关键词:  固体推进剂火箭发动机  计算空气动力学  网格生成  并行计算

Key words:  Solid propellant rocket engine  Computational aerodynamics  Grid generation  Parallel computing

摘要:

介绍一种网格分区构筑中区域边界的隐式处理方法──ADMZI法。该方法具有简单实用、数据结构灵活等特点,特别适合于区域边界难以确定的情况。将该方法应用于多级火箭级间分离时的流场物理域网格构筑,结果证明是成功的。

Abstract:

Zonal boundaries of sub-zone exist in numerical grid generation with decomposition ofcomputational domain and the boundary condition on these zonal boundaries is numerical rather thanphysical, which is usually difficult to deal with. A method named ADMZI (Alternating DirectionMulti-Zone Imlicit) dealing with zonal boundaries implicitly is presented. This method is simple andpractical. It possesses flexible data structure and is especially suitable for zonal boundaries difficult tobe defined. With this method the grid in the flowfield between two stages at the moment of separationof multi-stage rocket is generated. The results show that it is successful to be applied in thiscondition.