尾翼对高速汽车气动特性及制动性能的影响  

Influence of Tail Wing on Aerodynamics and Braking Performance of High-speed Vehicle

作　　者：孔昕昕 高伟 张学聪 Kong Xinxin;Gao Wei;Zhang Xuecong(School of Automotive Engineering,Hubei University of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院汽车工程学院,湖北十堰442002

出　　处：《湖北汽车工业学院学报》2022年第1期12-15,共4页Journal of Hubei University Of Automotive Technology

基　　金：汽车动力传动与电子控制湖北省重点实验室创新基金(2015XTZX0424)。

摘　　要：为了提高高速汽车在湿滑、冰雪路面紧急制动时的主动安全性,以MIRA模型为基础,设计了尾翼系统,对加装尾翼的MIRA汽车进行外流场数值模拟,分析了尾翼对高速汽车气动特性及制动性能的影响,并研究了尾翼攻角、纵向水平距离和垂向高度参数的影响规律。结果表明:高速汽车加装尾翼后增加了整车的气动阻力和负升力,有利于提高有效制动力;整车的气动特性及制动性能随着尾翼攻角的增大、纵向水平距离的增加、垂向高度的升高得到有效改善。To improve the active safety of high-speed vehicles during emergency braking on slippery,icy and snowy roads,a tail wing system was designed based on the MIRA model.Numerical simulation of the outflow field of the MIRA car with a tail wing was conducted.The influence of tail wing on aerodynamic characteristics and braking performance of high-speed vehicle was analyzed.And influential laws including the tail angle of attack,longitudinal horizontal position and vertical height parameters were also studied.The results show that the installation of tail wings on high-speed vehicle increases the aerodynamic drag and negative lift of the whole vehicle,which is conducive to improving the effective braking force.The aerodynamic characteristics and braking performance of the whole vehicle are effectively improved with the increase of the tail wing angle of attack,the increase of the longitudinal horizontal position,and the increase of the vertical height.

关 键 词：高速汽车 尾翼 数值模拟 制动性能 气动特性 

分 类 号：U461.1[机械工程—车辆工程]