Flow-energy harvesting using a fully passive flapping foil: A guideline on design and operation
Flow-energy harvesting using a fully passive flapping foil: A guideline on design and operation
复制标题
使用完全被动拍动箔片进行流能采集:设计和操作指南
DOI:
10.1016/j.ijmecsci.2021.106323
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发表时间:
2021-05
影响因子:
7.3
通讯作者:
Hui Tang
中科院分区:
文献类型:
--
作者:
Fuwang Zhao;Muhammad Nafees Mumtaz Qadri;Zhaokun Wang;Hui Tang
Abstract Following our previous work [Int. J. Mech. Sci. (2020), vol. 177, we searched the best power extraction performance of a novel flow-energy harvester, which utilizes a fully passive flapping foil to extract energy from air/water flows. A series of water-tunnel experiments were conducted on the same test model at the Reynolds number around 10 5 . Through investigating the effects of two unexplored key parameters, a higher overall maximum power conversion efficiency of 42.7 % was obtained at water speed 0.71 m/s and foil pitching amplitude 60 ∘ , corresponding to a larger mean power output of about 1.51 W. A quasi-steady theoretical model was also developed to fast predict the system performance in a larger parameter space. It was found that, in addition to typical dynamics, i.e., a flapping cycle includes two pure-heaving phases and two stroke-reversal phases, the foil system can also continuously operate in a “no-pure-heaving” zone where a flapping cycle only includes two successive stroke-reversal phases. Through these experimental and theoretical studies, a useful guideline was proposed on the design and operation of the foil system.
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