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Abstract. Air drag can affect the cruising ability of pure electric vehicles, especially in the case of high-speed driving. In this project, using 3D laser scanner, we can acquire the point cloud data of the Model S vehicle of Tesla, and the STAR-CCM+ software of Siemens is used to analyse the aerodynamic performance[1] aiming at different working conditions for ground-clearance, tire rotation, tread pattern and so on. The drag coefficient and local flow field data of the vehicle in different working conditions are simulated and the mechanism of flow is analyzed. That could provide experiences for the design of aerodynamic shape of passenger cars. There is practical significance for reference.

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