Wind Tunnel Tests of a Simplified Car Model for Validating Vehicle Aerodynamics CFD

Abstract

In this study, wind tunnel tests of a simplified car model have been conducted to obtain reference data for validation of vehicle aerodynamics computational fluid dynamics (CFD). A model with smooth rear-top shape, which did not fix the separation point, was chosen for the CFD validation specifically to validate the predictions of boundary layer development and flow separation. Additionally, an aerodynamic appendage like a spoiler was introduced as a geometric variation to promote flow separation. The tests measured six components of aerodynamic force, surface pressure, and surrounding flow field. This study reported on relevant aerodynamic phenomena and quantitative results.