Three–Dimensional Numerical Investigation of a New Drag Reduction Device Applied to Ahmed Body

In this work, a novel drag reduction device applied to the Ahmed body is presented. This consists of perforating a rectangular conduit in the body. The purpose of this conduit is leading part of the airflow from the front and inject it in the recirculation region behind the body. Three–dimensional simulations have been carried out, at a Reynolds number of \({\text{Re}} = 2.85 \times 10^{6}\) , with the software of computational fluid dynamics ANSYS FLUENT. The influence of changing the conduit dimensions and its position from the lower slant edge on drag coefficient is presented. This study is a continuation of the two–dimensional numerical study of this drag reduction technique.