汽车底部流场对气动阻力性能影响的研究  

Numerical Research on Influence of the Underbody Flow Structure of Automotive Aerodynamic Performance

作　　者：刘学龙[1] 闫晓晓[1] 黄森仁[1] 

机构地区：[1]中国汽车技术研究中心,天津300300

出　　处：《新型工业化》2015年第3期35-41,共7页The Journal of New Industrialization

基　　金：中国汽车技术研究中心

摘　　要：汽车底部流场对整车气动性能具有重要影响,车体底部产生的气动阻力可占到整车阻力的30%左右。本文针对某运动型多用途汽车(SUV),采用计算流体动力学(CFD)数值模拟的方法,在车速120km/h的工况下,分析了汽车底部添加气动附件(前阻流板、车轮前后阻风板、车体底部导流板)对整车气动性能的影响。分析结果表明,在车体底部和轮胎附近添加合适的气动附件,使得整车气动阻力下降了大约6%。The flow structure under the car, which caused about 30% air resistance of the vehicle, has a significant influence on the vehicle’s aerodynamic performance. A CFD(Computational Fluid Dynamics) method is used to do research on aerodynamic accessories’ (including front damp panel, front wheel damp panels, rear wheel damp panels, and guiding panel under the middle of the car) influence on a SUV(Sport Utility Vehicle) at the speed of 120kph. The result showed that proper design of aerodynamic accessories under the vehicle could decrease the air resistance by nearly 6 percent.

关 键 词：运动型多用途汽车 计算流体动力学 空气动力学 底部流场 STAR-CCM+ 

分 类 号：U461.1[机械工程—车辆工程]