Analysis of Influence of Wheel Rotation Rate on Wind Drag in RSWT

Abstract:

In reduces scaled wind tunnel （RSWT） tests， if the wheel speed is set to the same as the wind， it will double the tire rotation angular velocity， making it more difficult to design a scaled model. At the same time， it will cause a greater instability. Therefore， it is necessary to analyze the effect of tire speed on wind resistance in RSWT tests to explore the feasibility of tire speed reduction tests. Based on a MPV， the influence of wheel rotation speed is analyzed using wind tunnel test and the computational fluid dynamics （CFD） method. The result shows that the tire speed has an impact on the wind resistance test results. The wheel speed setting of the scaled model is the same as the incoming flow， and the scaled model is more consistent with the full-scale wind resistance results.

Key words:reduced scaled wind tunnel test(RSWT);wheel rotation speed;aerodynamic resistance;simulation analysis