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Article Dans Une Revue Journal of Wind Engineering and Industrial Aerodynamics Année : 2008

Computational study of flow around a simplified car body

Résumé

The Ahmed body is a simplified car used in automotive industry to investigate the influence of the flow structure on the drag. Wake flow is two-dimensional for low incidences of the rear slant, then becomes three-dimensional when the angle of the hatchback approaches 30° and reverts to two-dimensional behavior for angles higher than 30° where above this angle, a sudden drop in drag occurred. In this paper, we investigate numerically the flow around the Ahmed body for the base slant angles 25° and 35°. Results are compared with experimental data. The two-dimensional behavior of the flow, for the slant angle , is well predicted, whereas the transition of the wake to a fully three-dimensional, for the slant angle 25°, is not reproduced. Therefore, the flow around the Ahmed body with 25° slant angle can be considered an open challenge for turbulence modeling.
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Dates et versions

hal-04553632 , version 1 (23-04-2024)

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Emmanuel Guilmineau. Computational study of flow around a simplified car body. Journal of Wind Engineering and Industrial Aerodynamics, 2008, 96 (6-7), pp.1207-1217. ⟨10.1016/j.jweia.2007.06.041⟩. ⟨hal-04553632⟩
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