平面壁上の有限幅直立平板まわりの流れに及ぼす迎え角の影響(流体工学,流体機械)

概要

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This paper describes the influence of attack angle on the flow past a flat plate of finite width placed vertically on ground plane. The experiment was carried out in the 800 mm diameter Eiffel type wind tunnel having the working section of 1.5 m 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 X component of fluctuating velocity was measured to check the arch vortices shedding behind the flat plate. The vortices generated in the flow field around a flat plate have also been observed by flow-visualization. Consequently, it is found that the disappearance of shedding arch vortices is in the range of α≧45°for W/H=2 and 4, while the drag coefficient decreases and lift coefficient attains maximum near α=45°for W/H≧4.
社団法人日本機械学会の論文
2006-02-25