运动型多功能车外流场的数值模拟  

Numerical Simulation Research on Flow Field Outside SUV

作　　者：杨永柏[1] 傅立敏[1] 刘畅[1] 

机构地区：[1]吉林大学

出　　处：《汽车技术》2007年第10期24-27,共4页Automobile Technology

基　　金：国家自然科学基金资助项目(60222207)。

摘　　要：选取LUD离散格式、RNGκ-ε湍流模型,利用计算流体力学进行了运动型多功能车外流场的模拟研究。结果表明,模拟所得车身表面压力分布、尾流典型截面各向流速分布、尾流结构等与风洞试验值吻合性好;SUV尾流中存在上、下不对称的反向涡对,抑制该涡对的大小和强度可减小气动阻力。CFD was used to simulate flow field outside a SUV.LUD discrete scheme and RNGK-εoverfall model were selected.The results show：the surface pressure distributions,the wake velocity distribution of the special profiles and the wake flow structures were similar with wind tunnel experimental.Two asymmetry inverse wake vortexes are located in the SUV wake flow.To restrict the development of the wake vortexes can reduce the drag coefficient.

关 键 词：SUV 表面压力 涡流 计算流体力学 数值模拟 

分 类 号：U463.82[机械工程—车辆工程]