跨界车前轮导流板减阻的数值模拟研究  

Numerical Simulation Research on Drag Reduction of Front Wheel Deflector of Crossover

作　　者：李蛟 王玉璋[1] 王夫亮[2] 尹章顺[2] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]泛亚汽车技术中心有限公司,上海201201

出　　处：《机电一体化》2021年第4期22-30,共9页Mechatronics

基　　金：上海汽车工业科技发展基金(1741)“跨界车型风阻前沿科技研究”项目。

摘　　要：针对某新型跨界车,采用数值模拟方法,研究了不同高度前轮导流板对整车气动性能的影响规律,深入分析了车轮区域流动特征,揭示了前轮导流板减阻机制,提出了前轮导流板优化设计方法,并优化设计了新型跨界车的前轮导流板。研究结果表明,优化设计的前轮导流板均有一定程度减阻效果,高度为50 mm前轮导流板减阻效果最佳,最大减阻率6.48%。在跨界车正常车速范围内,车速对前轮导流板的减阻率有一定影响,减阻率随车速增加而增加。在进行前轮导流板设计时,需要综合权衡减阻效果和气动升力。In this paper,the effect of the height of front-wheel deflectors on the aerodynamic performance of a new type of crossover vehicle is investigated with the numerical simulation method.The flow characteristics around the wheel are analyzed in depth,and the drag reduction mechanism of the deflector is revealed.A method for front-wheel deflector designing is put forward and according to this method,the front-wheel deflectors for this new crossover is optimized and designed.The results show that all of the optimized front-wheel deflectors are very effective in reducing drag,and height of 50 mm front wheel deflector has the best drag reduction effect above all,with drag reducing by 6.48%.The vehicle speed can influence the reduction of drag caused by the front-wheel deflectors in a certain degree,drag reduction rate will increase when the speed increases in the normal speed range of a crossover.lt is necessary to balance the reduction of drag against the rise of lift in designing the front-wheel deflector.

关 键 词：跨界车前轮导流板 数值模拟 气动性能 减阻 

分 类 号：U461[机械工程—车辆工程]