平面壁上の有限幅傾斜平板まわりの流れ(流体工学,流体機械)

概要

論文の詳細を見る
This paper describes the flow past an inclined flat plate of finite width placed on a ground plane. The experiment was carried out in the 800mm diameter Eiffel type wind tunnel having the working section of 1.5m length at Reynolds number of 5.1×10^4 mainly. The surface pressure distributions on the flat plate and on the ground plane around the flat plate were measured, and the drag coefficient and lift coefficient were determined from them. The power spectrum of the streamwise component of fluctuating velocity was measured to confirm the presence of arch type vortices shedding behind the flat plate. The vortices generated in the flow field around a flat plate were also observed by flow-visualization. Consequently, it was found that the arch type vortices are shed in the range of inclining angle of 60°≦β≦90°for W/H=2 and 4, while the drag coefficient attains maximum near β=90°and the lift coefficient decreases for W/H=2, 4 and 7, as β increases from 30°to 135°.
2007-01-25