全尺寸汽车风洞天平附加升力修正影响研究

doi:10.19562/j.chinasae.qcgc.2025.07.018

Abstract

Abstract:

Based on the CAERI Aero Model vehicle， the additional lift generated by wheel driving units （WDU） in the process of vehicle wind tunnel test is studied. The pressure data and flow field data of the front and rear WDU surface are obtained by wind tunnel test and numerical simulation， and the influencing factors and differences of the additional lift correction are analyzed. The results indicate that tire rotation and tire size have obvious influence on additional lift during wind tunnel test. At the same time， the test position of the model is an important factor affecting the additional lift correction. When the position of the tire relative to WDU changes， the maximum influence on the additional lift correction of the front and rear wheel is 26 and 14 counts respectively.

Key words: automotive aerodynamics, wind tunnel test, wheel drive units, numerical simulation, additional lift

Chao Peng,Han Bu,Qingyang Wang,Qianwen Zhang,Jie Yang,Gan Lian. Correction Study of Balance Additional Lift in Full-Scale Vehicle Wind Tunnel[J].Automotive Engineering, 2025, 47(7): 1415-1424.

Figures/Tables 24

References 22

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序号	测试工况	车轮状态
1	雷诺数扫略	旋转、静止
2	只封闭上格栅	旋转、静止
3	只封闭下格栅	旋转、静止
4	封闭上下格栅	旋转、静止
5	增加前轮阻风板	旋转、静止
6	封闭车辆轮辋	旋转、静止

边界条件	设置情况
入口	速度入口=20 km/h
入口	湍流强度=0.002，湍流黏度比=5
出口	压力出口
边界层控制系统	流量入口
五带系统速度	120 km/h
车轮模拟方法	旋转壁面法（rotating wall， RW）
其他边界	静止壁面

仿真工况	前轮WDU/N	后轮WDU/N
基础工况轮胎旋转	35.26	18.27
基础工况轮胎静止	28.33	12.61
增加前轮阻风板轮胎旋转	36.73	18.23
增加前轮阻风板轮胎静止	29.37	13.13
封闭轮辋轮胎旋转	37.31	18.50
封闭轮辋轮胎静止	29.67	12.55

仿真工况	前轮附加升力系数C_Lf	后轮附加升力系数C_Lr
基础工况轮胎旋转	0.049	0.026
基础工况轮胎静止	0.040	0.018
增加前轮阻风板轮胎旋转	0.051	0.026
增加前轮阻风板轮胎静止	0.041	0.018
封闭轮辋轮胎旋转	0.052	0.026
封闭轮辋轮胎静止	0.042	0.018

工况	前轮/N	后轮/N
基础工况	35.26	18.27
轮胎加宽30 mm	40.06	20.28
轮胎缩窄20 mm	32.06	16.80

Correction Study of Balance Additional Lift in Full-Scale Vehicle Wind Tunnel

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