ヒービング運動翼の後流構造と非定常推進力(S22-4 物体周り流れの制御-2,S22 流れ制御の技術)

概要

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The dynamic thrust acting on a heaving airfoil, NACA0010 has been measured by using a six-axes sensor in a water tunnel at low Reynolds number region under the condition of various heaving frequencies and amplitudes. The dynamic thrust depends on the non-dimensional heaving velocity strongly and does not depend on the non-dimensional heaving amplitude. The averaged dynamic thrust during one heaving cycle increases as the non-dimensional heaving velocity increases. The hysteresis loop of dynamic thrust has convex shape characteristics and the dynamic thrust is maximum at the non-dimensional heaving amplitude h = 0.0. The thrust efficiency of heaving airfoil is about 20 % at the non-dimensional heaving velocity V_h = 0.4.
一般社団法人日本機械学会の論文
2004-09-04