二维杂交网格粘性湍流分离流场的数值计算  

Numerical Simulation of Separated Flow via 2D Hybrid Grid Technique

作　　者：罗建曦[1] 张扬军[1] 张宝宁[1] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《动力工程》2003年第1期2240-2244,共5页Power Engineering

摘　　要：给出了基于非结构化网格数值求解二维粘性湍流分离流场的压力修正算法。采用 Delaunay三角划分法生成三角形非结构网格以适应复杂几何形状 ,壁面采用结构网格以满足粘性湍流流场计算的要求。湍流模型为 RNG k-ε模型 ,以考虑壁面低 Re数效应和曲率对分离流动的影响。利用所给出的算法对 NACA0 0 1 2翼型二维大尺度分离流场进行了计算 ,计算结果和实验结果基本一致。图 7参A pressure correction algorithm was taken out to solve 2D viscous turbulent flow field. Delaunay triangulation was applied to adapt complex shapes and geometries, and structured grids were generated near the wall to satisfy the computation requirement of turbulent flow fields. Concerning the correction of the low Re number effect near walls and the curvation influence to flow separation, the 2D N S equations were solved with k ε turbulence model. The algorithm developed in this paper was used to simulate the 2D large scale separation flow field of NACA 0012 airfoil., and the computation results accorded with experienced results very well. Figs 7 and refs 6.

关 键 词：二维杂交网格 粘性湍流 分离流场 数值计算 分离流动 RNG k-ε模型 流体力学 

分 类 号：O357.5[理学—流体力学]