A-231 ヒービング運動翼背面上の渦構造と非定常揚力特性

概要

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Many studies on unsteady flow around an unsteady airfoil have been carried out with experimental and numerical studies. Most of them have been performed for high Reynolds number region. The streakline on the suction surface of a heaving airfoil for low Reynolds number region were visualized by dye flow visualization. Moreover, the dynamic lift acting on the heaving airfoil was measured by six-axes sensor in a water tunnel. At the higher angle of attack where the separation occurred under the stationary condition, the re-circulation region was formed on the suction surface of the heaving airfoil with higher non-dimensional heaving velocity. The vortex structure on the suction surface of the heaving airfoil depended on the non-dimensional heaving velocity strongly and did not depend on the non-dimensional heaving amplitude. The dynamic lift acting on the heaving airfoil was higher than the stationary lift because of the re-circulation region on the suction surface.
日本流体力学会の論文
2003-07-28