摘要
基于雷诺应力模型(Reynolds Stress Model,RSM)和有限体积法(Finite Volume Method,FVM),对轿车进行外流场的建模与仿真.在20m/s风速下,对全尺寸轿车模型进行三维稳态数值模拟,重点阐述网格划分、边界条件设定、压力与速度耦合方式的选择.通过与实验数据以及标准k-ε模型计算结果的比较,表明在描述轿车外流场分离特性时,RSM模型优于标准k-ε方程模型,这对车辆外流场研究具有借鉴意义.
The outer flow field over sedan is modeled and simulated based on Reynolds Stress Model （RSM） and Finite Volume Method （FVM）. 3D steady numerical simulation is carried out for 1：1 sedan model in 20 m/s velocity value. Especially, the mesh structure, boundary condition and choice of pres- sure-velocity coupling are specified. By comparison with the results of experiment and standard k-ε model simulation, it is showed that RSM model is better than standard k-ε model when they are adopted to simu- late the separated outer flow field around sedan. The over vehicles. results are significant for the study of outer flow field
出处
《计算机辅助工程》
2007年第3期88-91,共4页
Computer Aided Engineering
关键词
雷诺应力模型
标准k-ε模型
有限体积法
计算流体力学
轿车
外流场
Reynolds stress model
standard k-ε model
finite volume method
computational fluid dynamics
sedan
outer flow field
