タフト法による平板の周りの流れの可視化

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This paper describes the relationship between the surface flow and stall on the flat plates in relation to angle of attack, and discusses the effect of the bottom on the flow. Two flat plates (aspect ratio λ=0.5 and 1.5) were used for flow visualization by the tuft method in a circulating water tank. Thin nylon twine tufts were attached to the suction side of the flat plate surface. The results show that as the angle of attack (a) increased, the separation from the leading edge also increased, extending laterally towards the trailing edge of the suction side. When the suction side was completely covered by the separation, the flat plate was stalled. In the case of λ=0.5, the suction side in free stream did not completely separate until the angle of attack reached a=40°, however, there was already complete separation on the bottom even at a=30°. When λ=1.5, the rate of separation in free stream was almost the same as that on the bottom.
公益社団法人日本水産学会の論文