Aerodynamic performance of several passive vortex generator configurations on an Ahmed body subjected to yaw angles

Abstract We evaluate the aerodynamic performance of several passive vortex generators (VGs) placed on a standard Ahmed body, with slant angle ( ? = 35º), subjected to different yawing angles ? ) using RANS-based models. Rigorous validation numerical results is performed previously published experimental data for ? 8º) body. Our model depict good overall agreement sets. An array such as delta-winglet (DVGs), cylindrical (CVGs) and trapezoidal (TVGs) types are introduced validated model. The introduction CVGs DVGs tends have beneficial 0º). In contrast, TVGs tend impair by producing massive flow separation over Conversely, > 0º), swift transition happens wherein high-energy streamwise vortices that produced improve pressure footprint, thereby reducing drag. A deterioration in predicted during 4º), ‘c’-pillar leeward side interferes vortical structure, which adversely influences roof-slant edge. Overall, maximum ~ 8.5% 7.7% drag reduction appears be possible designed at smaller vehicle conditions.