适用于混合网格重叠的线性插值方法

An Linear Interpolation Method for Overset Mixed Grids Approach

摘要: 基于线性重构方法，给出了一种适用于混合网格重叠方法的插值策略。该方法依赖于插值单元的格心流场变量值、单元梯度值和限制器函数值的计算来完成，只需要一层插值单元，就可以充分利用其宿主及所有相邻单元的信息。本文方法适用于任意网格单元类型间的插值计算，应用简洁方便。几个算例验证表明，本文方法适用于亚跨超全速域流场的数值计算。

Abstract: An interpolation method based on the linear reconstruction is developed for the overset mixed grids approach. The present method depends on the calculations of the values of flow variables, the gradients and the limiter functions of the fringe cells. It employs only one layer of fringe cells along the intergrid boundary to use information of all adjacent cells of its donor. The present in-terpolation method treats different cell types in the same way, so it is very simple to apply. Several numerical results demonstrate that the present method can simulate subsonic, transonic and hypersonic flows.