前保险杠导流板迎风角度对轻型客车风阻的影响  

Influence of the Windward Angle of Front Bumper Deflector on the Aerodynamic Drag of a Light Bus

作　　者：李爽爽 宋伟[2] 邹亮[2] 闵峻英[1,3] 林建平 Li Shuangshuang;Song Wei;Zou Liang;Min Junying;Lin Jianping(School of Mechanical Engineering,Tongji University,Shanghai 201804;Nanjing Iveco Co.,Ltd.,Nanjing 210028;Shanghai Key Lab of Metal Functional Materials,Shanghai 201804)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]南京依维柯汽车有限公司,南京210028 [3]上海市金属功能材料开发应用重点实验室,上海201804

出　　处：《汽车工程》2022年第11期1779-1785,共7页Automotive Engineering

摘　　要：为降低轻型客车在行驶中的空气阻力以达到汽车节能的目的,本文研究了前保险杠导流板迎风角度对整车风阻的影响。针对原型车和加装了迎风角度为35°~90°导流板的整车进行了计算流体力学(CFD)分析。结果表明,在前保险杠处加装不同迎风角度的导流板均具有降阻效果,其中迎风角度为45°时风阻系数最小。同时进行了整车风洞试验,结果表明,在80~120 km/h的风速下,加装迎风角度为45°的导流板使风阻系数在进气格栅开放和封闭两种条件下分别下降0.2%~0.5%和3.3%~3.9%。In order to reduce the aerodynamic drag of light bus during driving for energy saving,the influence of the windward angle of the front bumper deflector on the wind resistance of the vehicle is investigated in this paper.Computational fluid dynamics analysis is carried out on both the original vehicle and the vehicles equipped with a deflector with a windward angle of 35°~90°.The results show that adding deflectors with different windward angles on the front bumper has a drag reduction effect,with the minimum drag coefficient achieved at a windward angle of 45°.A wind tunnel test on the vehicle is also performed and the results indicate that with a test wind speed of 80~120 km/h,the drag coefficient reduces by 0.2%~0.5%and 3.3%~3.9%respectively under the conditions of opened and closed air intake grilles by adding a deflector with a windward angle of 45°.

关 键 词：前保险杠导流板 风阻系数 迎风角度 风洞试验 

分 类 号：U461.1[机械工程—车辆工程]