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Aerodynamic Characteristics Analysis of Curve Overtaking Based on CFD

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DOI: 10.23977/jemm.2023.080412 | Downloads: 15 | Views: 241


Tang Hongtao 1,2, Wang Wei 1,2, Chen Jiahui 1,2, Zhou Nenghui 3


1 Tianjin University of Science and Technology, Tianjin, 300222, China
2 Tianjin Key Laboratory of Integrated Design and Online Monitoring of Light Industry and Food Engineering Machinery & Equipment, Tianjin, 300222, China
3 Tianjin Yidingfeng Power Technology Co., Ltd., Tianjin, 300380, China

Corresponding Author

Tang Hongtao


In this paper, numerical simulation of the overtaking process in a curve is carried out based on Computational Fluid Dynamics (CFD) and dynamic mesh technology, and the flow field distribution data between the main overtaking vehicle and the overtaken vehicle at different speeds are statistically analyzed. The study shows that: during the overtaking process in a bend, pressure and flow field changes of different degrees occurred between the two vehicles. As the relative position between the vehicles changes, the higher the speed of the main overtaking vehicle, the more drastic the aerodynamic force changes between the two vehicles; the fluctuation range of the change curve of the lateral force coefficient of the overtaken vehicle is larger, and the lateral force also appears to have a larger extreme value. The overtaking vehicle caused a forward shift of the overtaken vehicle's centre of pressure in relation to its centre of mass. This induced an increase in lateral force and swinging moment, rendering the vehicle more unstable and prone to rollover and skidding, severely compromising driving stability.


Road curve; overtake; difference in pressure; center of presssue; vortex


Tang Hongtao, Wang Wei, Chen Jiahui, Zhou Nenghui, Aerodynamic Characteristics Analysis of Curve Overtaking Based on CFD . Journal of Engineering Mechanics and Machinery (2023) Vol. 8: 85-96. DOI:


[1] Fu Limin. Automotive Design and Aerodynamics [M]. Beijing: Machinery Industry Press, 2010.
[2] Wang Baoyu Research on Transient Aerodynamic Characteristics of Bend Meeting [D]. Jilin University, 2016.
[3] Zheng Hao, Kang Ning, Lan Tian. The effect of distance between two cars on the aerodynamic characteristics of a sedan during overtaking [J]. Journal of Beihang University, 2008, 34 (4).
[4] Zhou Wei, Gu Zhengqi. Simulation analysis and research on the external flow field under overtaking conditions [J]. Automotive Engineering, 2005, 27 (3): 344-346.
[5] Gu Zhengqi, Huang Tianze. Numerical simulation of pressure distribution on car body surface, Journal of Hunan University, 1994.
[6] LIU L-N, WANG X-S, DU G-S, et al. Transient aerodynamic characteristics of vans during the accelerated overtaking process [J]. Journal of Hydrodynamics, 2018, 30(2): 357-364.
[7] Hongtao Tang, Daoxian Tong, Xiang Zhang, Honglin Chen and Nenghui Zhou (2023) “Study on Aerodynamic Characteristics between Right Turning Vehicles and Straight Running Vehicles”, Innovation in Science and Technology, 2(2), pp. 25–31. 
[8] PARK S O, LEE J H, KIM M S, et al. Numerical Study on Understanding the Force and Moment Changes Acting on the Overtaking Vehicle During Overtaking Process [J]. International Journal of Automotive Technology, 2023, 24(1): 195-205.
[9] Liu J, Gu Z, Huang T, et al. Coupled analysis of the unsteady aerodynamics and multi-body dynamics of a small car overtaking a coach [J]. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2019, 233(14): 3684-3699.
[10] Zhang Yingchao. Numerical Simulation Technology of Automotive Aerodynamics [M]. Beijing: Peking University Press, 2011.
[11] Fu Limin. Automotiv Aerodynamics [M]. Beijing: Peking University, 2006.
[12] Zhou Kan, Zhou Jun. Safe Spee for Turning Cars [J]. Physics Teacher, 2013, 34 (06): 60-61.
[13] Gu Zhengqi, Wang Heyi, Luo Rongfeng et al. Study on crosswind stability of automobiles considering drift of wind pressure center [J]. Journal of Hunan University (Natural Science Edition), 2005 (03): 70-73.

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