0123 三次元翼の急激な迎角変化による非定常流体特性(OS1-5 噴流,後流および剥離流れ現象の解明と制御,オーガナイズドセッション)

概要

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The transient aerodynamic characteristics of the unsteady force are investigated by varying impulsively the incidence of the airfoil beyond the stall angle. In this study, we measured unsteady fluid force acting on the airfoil simulating a human hand in swimming using load cells and visualized vortices in the wake in a wind tunnel. We also examined the relation among fluid force, angle of attack, and rise time. As a result, impulsively varied incidence makes an angle of the static stall larger and also the lift coefficient larger. We investigated the dynamic flow vector and vorticity fields at Reynolds number 1.O×10^5.The vortex shedding from the airfoil cause s the changes in the transient characteristics.
一般社団法人日本機械学会の論文
2010-10-29