Research on Underbody Flattening of a Passenger Vehicle towards Aerodynamics Optimization

2nd International Conference on Robotics and Mechantronics

计算机科学;无线电电子学

He, Xiaona^1^2 ; Li, Tao^3 ; Xi, Chunfu^2 ; Zhang, Honghui^1

State Key Lab. of Vehicle NVH and Safety Technology, Chongqing

401122, China^1

China Automotive Engineering Research Institute Co., Ltd., Chongqing

401122, China^2

Beijing New Energy Automobile Co., Ltd., Beijing

102606, China^3

关键词: Aero-dynamic performance;    Aerodynamics optimizations;    CFD method;    External flow;    Lift coefficient;    Passenger vehicles;    Wind tunnel tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/517/1/012006/pdf
DOI  :  10.1088/1757-899X/517/1/012006

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A CFD method for the full-scale external flow of a passenger vehicle is established. Based on the comparison between the simulation and wind tunnel test results, the reliability to use this model and method for the aerodynamic drag coefficient (Cd) and lift coefficient (Cl) prediction of the vehicle is verified. The trend of Cd and Cl for five models with different underbody flattening degree shows the significance of underbody flattening on the aerodynamic performance, with nearly 18% on the drag and over 30% on the lift coefficient optimization.