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Influence of running speed and lateral distance on vehicle transient aerodynamic characteristics during curve crossing |
| State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, Jilin 130022, China |
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Abstract The computational fluid dynamics with overlapping grid was used to conduct the numerical simulation of two simplified DrivAer model for curve crossing. The effects of absolute velocity, relative velocity and lateral distance on the six aerodynamic forces were investigated. The results show that the directions of side force, rolling moment and yawing moment are changed when cars pass each other, and their values reach the maximum or minimum values in short time interval. The changing trend becomes more obviously as the absolute velocity is increased. When the relative velocity is increased, the flow field interference of both cars is enhanced. The maximum values of aerodynamic forces are increased when the lateral distance is decreased. All of these can affect the vehicle handling stability.
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2017, Vol. 38 
