基于SST湍流模型的超车时汽车外流场变化的仿真分析  

Numerical Simulation on the Change of External Flow Field During Vehicle Overtaking Based on SST Turbulence Model

作　　者：谷正气[1] 姜波[1] 何忆斌[1] 周伟[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《汽车工程》2007年第6期494-496,527,共4页Automotive Engineering

基　　金：国家自然科学基金项目(50275052);教育部优秀青年教师资助计划;国家留学归国人员科研基金项目资助

摘　　要：基于k-w模型的SST(剪切应力输运)湍流模型综合了k-ε和k-w湍流模型在边界层内外计算的优点,能够准确及时预测分离的特性。利用SST湍流模型对轿车超越轿车的过程运用计算机仿真技术进行数值模拟,得出被超轿车在此过程中的气动阻力系数和气动侧力变化曲线图,并对这一工况进行了分析。The based SST （ shear stress transport） turbulence model combines the advantages of and turbulence models, performs well in numerical experiment and can accurately and timely predict the characteristics of flow separation. In this paper, the SST turbulence model is used for the numerical simulation on external flow field of vehicle during ore vehicle are obtained rtaking process. Hence the changes in drag coefficient and side force coefficient of overtaken with the results analyzed.

关 键 词：SST湍流模型 超车 仿真 外流场 

分 类 号：U461.1[机械工程—车辆工程]