基于FLUENT的扰流器对某跑车升力系数影响的仿真分析  

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

作　　者：张作森 张玉玲 ZHANG Zuosen;ZHANG Yuling(School of Automotive Engineering,Chongqing University,Chongqing 400044;International Business School,Tianjin Foreign Studies University,Tianjin 300270)

机构地区：[1]重庆大学汽车工程学院,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13期38-40,62,共4页Automobile Applied Technology

摘　　要：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,用FLUENT软件进行升力系数的求解计算,用CFD-POST软件进行速度矢量图和压力云图的提取。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产生的不同升力系数,同时分析产生不同升力系数的主要原因是扰流器的存在延迟了车身上方和车身下方两股气流在车尾处的平稳汇合,导致车尾处扰流器下方存在一个较大的漩涡,车尾下方形成负压区,并且扰流器角度越大,负压区越大。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 mesh generation,FLUENT software for the calculation of lift coefficient,CFD-POST software for the extraction of velocity vector diagram and pressure nephogram.Through simulation calculation,the different lift coefficients of the original model and a sports car model with different angle spoiler are obtained.At the same time,the causes of different lift coefficients are analyzed.The main reason for different lift coefficients is that the existence of spoiler delays the smooth convergence of two airflow above and below the vehicle body at the rear of the vehicle,resulting in a large vortex under the spoiler at the rear of the vehicle.The larger the angle of the spoiler,the greater the negative pressure area.

关 键 词：计算流体力学 扰流器 升力系数 FLUENT 

分 类 号：U467[机械工程—车辆工程]