Study on Numerical Simulation of Crosswind Effects Arising from External Flow-field of Rotating-wheels

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Study on Numerical Simulation of Crosswind Effects Arising from External Flow-field of Rotating-wheels

Fu, Limin / Fu, Yuanfang

To study the effect of crosswind on the traffic safety, taking a $1 / 5$ model of a saloon car as an example, the turbulent flow field of the car platoon with flow-deviation angles of 0°, 5°, 10°, 15° and 30° respectively with stationary wheels and rotating wheels numerically simulated where moving ground and rotating wall were used to simulate the rotating wheel effect. The simulation output includes streamlines the saloon body and close to the wheels, the pressure curve of the longitudinal symmetrical section and the front-left wheels, and the surface shear force distribution under some condition. The side force coefficient of the all crosswind flow-fields with rotating wheels and stationary wheels were analyzed and discussed. The results showed that the side force increased rapidly with the growth of flow deviation angles and the drag reduced with rotating wheels as to this car and the precision of numerical simulation with rotating wheels is better than that of stationary wheels and which agrees with test.