尾部扩散器对FSAE赛车气动特性影响研究  

Effect Study of Rear Diffuser on Aerodynamic Characteristics of Formula SAE Racing Car

作　　者：南琼[1] 应保胜[1] 伍俊杰 姚建阳 NAN Qiong;YING Bao-sheng;WU Jun-jie;YAO Jian-yang(College of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Hubei Wuhan430081,China)

机构地区：[1]武汉科技大学汽车与交通工程学院

出　　处：《机械设计与制造》2019年第10期72-74,79,共4页Machinery Design & Manufacture

基　　金：国家级大学生创新创业训练计划项目(201510488007)

摘　　要：针对国内外FSAE赛车多以优化空气动力学装置改善整车气动性能的现状,以CATIA构造简化的赛车模型为研究对象,基于计算流体力学软件ANSYS Workbench平台,选取k-εRelizable物理模型,着重对六种不同的底部扩散结构进行气动特性数值模拟研究,结果表明:底部扩散结构的加装可改善赛车尾部流场结构;加装三角翼片的底部扩散结构对整车气动阻力影响较小,对气动升力提升较大,且三角翼片越多,气动升力改善越显著;以不同形式增加单横向翼片,可提升赛车的气动升力,同时进一步增加赛车高速及弯道行驶的操纵稳定性及安全性。Aiming at the domestic and foreign development present situation that FSAE racing cars improve vehicle aerodynamic performance by optimizing aerodynamic devices,this paper took simplified CATIA car model as research object to focus on the numerical simulation research of aerodynamic characteristics of six different bottom diffuser structures based on the k-εRelizable physical mode and ANSYS Workbench of computational fluid dynamics software platform.The results suggested that the installation of the bottom diffusion structure can improve the flow field structure,the bottom diffuser structure with the addition of delta wing has little effect on aerodynamic drag of the whole car,but promotion for aerodynamic lift is obvious,in addition the more triangular wings are,the more remarkable the aerodynamic lift is.The increase of the single triangle wing in different forms could enhance the aerodynamic lift of the car,and the handling stability and safety of high speed driving and turning are further improved at the same time.

关 键 词：FSAE赛车 空气动力学 数值模拟 底部扩散结构 气动特性 优化设计 

分 类 号：TH16[机械工程—机械制造及自动化] TH164