Energy Extraction Through Flapping Foils
Energy Extraction Through Flapping Foils
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DOI：
10.1115/omae2008-58043
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发表时间：
2008
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影响因子：
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通讯作者：
B. Simpson;S. Licht;F. Hover;M. Triantafyllou
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文献类型：
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作者：
B. Simpson;S. Licht;F. Hover;M. Triantafyllou
我们的实验表明，扑翼内迎面而来的流可以有效地从流中提取能量，从而提供了一个有吸引力的，替代能源生产的方式。扑翼最大的希望是在非定常和湍流中使用它们，在那里它们自己的非定常运动可以被控制以最大限度地提取能量。在这项研究中的翼型执行正弦线性运动（摇摆，或起伏）与正弦角运动（偏航或俯仰）相结合;系统地研究了三个主要参数的影响，偏航幅度，Strouhal数，和摇摆和偏航之间的相位角。翼型由铝制成，形状为NACA 0012翼型，使用三种不同的展弦比，4.1，5.9和7.9;它们在雷诺数约为14，000时进行了测试。通过简单的正弦运动可以实现高达52 ± 3%的效率，从而证明箔片可以有效地从非定常流中提取能量。
We demonstrate experimentally that flapping foils within an oncoming stream can efficiently extract energy from the flow, thus offering an attractive, alternative way for energy production. The greatest promise for flapping foils is to use them in unsteady and turbulent flow, where their own unsteady motion can be controlled to maximize energy extraction. The foils in this study perform a sinusoidal linear motion (sway, or heave) in combination with a sinusoidal angular motion (yaw or pitch); the effect of three principal parameters is studied systematically, yaw amplitude, the Strouhal number, and the phase angle between sway and yaw. The foils are made of aluminum, in the shape of NACA 0012 airfoils, using three different aspect ratios, 4.1, 5.9, and 7.9; they were tested at Reynolds numbers around 14,000. Efficiencies of up to 52 ± 3% are achieved with simple sinusoidal motions, thus demonstrating that foils can efficiently extract energy from unsteady flows.Copyright © 2008 by ASME