基于Euler方程的三维自适应笛卡尔网格应用研究

Applications of 3-D adaptive Cartesian grid algorithm based on the Euler equations

本文采用非结构自适应笛卡尔网格和有限体积法求解了三维Euler方程。在网格生成过程中,采用了基于模型几何数据、模型表面曲率和流场特征为基础的网格自适应生成及加密方法,采用模型特征恢复技术保证了计算模型与原始外形的一致。在计算中,将以中心差分为基础的Jameson有限体积法在三维笛卡尔网格中进行了推广。本文中对导弹、歼击机等复杂问题进行了数值实验,计算结果与风洞实验结果符合良好,并在工程实际中成功应用。

This report presents some new progress in the numerical simulation of arbitrary geometries using adaptive Cartesian grid algorithm and finite volume methods. The Cartesian grid is generated based on geometric and the body curvature.The solution is converged to a steady state using the Jameson's finite volume solver,To achieve automatic in flow simulation,solutionbased grid adaptation is applied.The software for engineering purposes has been developed and extensive calculations have been carried out for practical flow fields of missile and or fighter. The computation results are compared with experiment data, and the agreement is good. 