Flow past Flat a Plate of Finite Width Placed Vertically on a Ground Plane

Abstract

This paper describes the flow past a flat plate of finite width placed vertically on a ground plane. The experiment was carried out in an 800 mm diammeter Eiffel type wind tunnel with a working section of 1.5 m length and mainly at Reynolds number of 5.1×104.The surface pressure distributions on the flat plate and on the ground plane around the flat plate were measured, and the drag coefficient was determined from them. The vortices generated in the flow field around a flat plate have also been observed by flow-visualization. Furthermore the time mean velocity in the flow field behind the flat plate was measured by use of a laser Doppler velocimeter. Consequently, it is found that the disappearance of shedding arch vortices is in the range of W/H=4-7, while the drag coefficient attains minimum near W/H=5.