Abstract
The pressure field on the ground plane around three-dimensional bluff bodies with varying relative dimensions has been obtained experimentally. The pressure measurements along the plane of symmetry are presented for the cases when the bodies are exposed to a uniform approach flow (without the presence of a horse-shoe vortex) and when the bodies are kept in a boundary layer. The results show extreme base suction for a body with a relative length to width ratio (l/b) of 0.5. A horse-shoe vortex exists at the front end for the bodies kept in the boundary layer. The isobaric coefficient contours presented for the region away from the plane of symmetry clearly indicate the regions of suction pressure around the bodies and how they vary with the relative dimensions. The vortex system at the front end is also revealed by the isobars.
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