摘要
为研究带侧翼式扩散器对汽车气动特性的影响,将其安装在CAERI Aero Model标准模型上,采用计算流体动力学(CFD)软件对不同扩散器安装角度下车辆的气动阻力和升力进行仿真,并与安装普通直板式扩散器进行对比,其中直板式扩散器某一安装角度的仿真结果通过了风洞试验的验证,以确认仿真的可靠性。仿真结果表明,带侧翼式扩散器能改变车辆底部和尾部涡结构的分布,与直板式扩散器相比,带侧翼式扩散器在不同安装角度下均能有效降低车辆的气动升力,在安装角度α=10.5°时,气动升力降低最大,达38.1%。带侧翼式扩散器能在气动阻力略为增大的条件下大幅减小气动升力,有效提升车辆的气动行驶稳定性和安全性。
In order to study the influences of the side-wing diffuser on the aerodynamic characteristics of a car,a side-wing diffuser is installed on the CAERI Aero Model,and a computational fluid dynamics(CFD)soft⁃ware is used to simulate the aerodynamic drag and lift force of vehicle with diffuser installed at different angles,and compared with general plane diffuser,in which the simulation result of the plane diffuser with a certain installation angle has been verified by wind tunnel test to conform the reliability of the simulation.The results of simulation show that the side-wing diffuser can change the distribution of vortex structure at the bottom and tail of the vehicle.Com⁃pared with the plane diffuser,the side-wing diffuser can effectively reduce the aerodynamic lift of the vehicle at dif⁃ferent installation angles of diffuser,with the maximum declining rate of aerodynamic lift force reaching 38.1%at an installation angleα=10.5°.The side-wing diffuser can greatly reduce the aerodynamic lift with a trivial increase of aerodynamic drag,effectively enhancing the driving stability and safety of vehicle.
作者
廖洪
卢耀辉
王庆洋
尹小春
史潇博
唐艳辉
Liao Hong;Lu Yaohui;Wang Qingyang;Yin Xiaochun;Shi Xiaobo;Tang Yanhui(College of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031;Wind Tunnel Center,China Automotive Engineering Research Institute Co.,Ltd.,Chongqing 401122)
出处
《汽车工程》
EI
CSCD
北大核心
2021年第11期1653-1661,共9页
Automotive Engineering
基金
汽车空气动力学标准模型和风洞试验数据相关性研究(011512.05)资助。
作者简介
通信作者:王庆洋,博士,E-mail:wangqingyang@caeri.com.cn。
