基于FLUENT的扰流器对某跑车阻力系数影响的仿真分析  

Simulation Analysis of the Influence of Spoiler on Drag Coefficient of a Sports Car Based on FLUENT

作　　者：田会 张作森 张玉玲 TIAN Hui;ZHANG Zuosen;ZHANG Yuling(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044;International Business School,Tianjin Foreign Studies University,Tianjin 300270)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]天津外国语大学国际商学院,天津300270

出　　处：《汽车实用技术》2021年第15期128-130,140,共4页Automobile Applied Technology

摘　　要：伴随着计算机技术的迅速发展,计算流体力学(CFD)理论在汽车设计开发的过程中应用日益广泛。文章以计算流体力学为理论基础,以某跑车模型作为研究对象,使用ANSA软件进行模型的几何清理和网格划分、FLUENT软件求解计算阻力系数、CFD-POST软件提取速度矢量图和压力云图。通过仿真计算得到了原始模型和加装不同角度扰流器后某跑车模型的不同阻力系数,同时分析产生不同阻力系数的原因,得到产生不同阻力系数的主要原因是扰流器的存在延迟了两股气流在车尾处的平稳汇合,导致车尾处扰流器后方形成漩涡区,并且扰流器的角度越大,车尾漩涡区越大,表现为阻力系数越大。With the rapid development of computer technology,computational fluid dynamics(CFD)theory has been widely used in the process of automobile design and development.Based on the theory of computational fluid dynamics,this paper takes a sports car model as the research object,uses ANSA software for geometric cleaning and meshing,FLUENT software to solve the calculation of drag coefficient,and CFD-POST software to extract velocity vector diagram and pressure nephogram.Through simulation calculation,the different drag coefficients of the original model and a sports car model with different angle spoiler are obtained.At the same time,the causes of different drag coefficients are analyzed.The main reason for the different drag coefficients is that the existence of the spoiler delays the smooth convergence of the two airflow at the rear of the vehicle,resulting in the formation of a vortex area behind the spoiler at the rear of the vehicle.The larger the angle of the spoiler is,the larger the vortex area at the rear of the vehicle is,and the greater the drag coefficient is.

关 键 词：计算流体力学 扰流器 阻力系数 FLUENT 

分 类 号：U467[机械工程—车辆工程]