Flow Past Cone Placed on Flat Plate

概要

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This paper presents an experimental investigation on the flow past a cone placed on a float plate and its wake. The vertex angle of the cone was varied 60°, 90°, 120° and 150°. The surface-pressure distributions on the cone and the flat plate, the velocity and the static pressure in the wake were measured, and the separation and the vortex formation were observed by visual means. The main results are as follows : (1) There occur necklace-like vortices around the cone of vertex angle 60°~120°, and horse-shoe vortices generated behind the cone are shed downstream periodically. (2) The lift acting on the cone and the drag decrease with an increase in the vertex angle. (3) There exists a region of negative wake, which becomes maximum at a downstream distance of about twelve times the height of cone.
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