Simulation of power extraction from tidal currents by flapping foil hydrokinetic turbines in tandem formation
Simulation of power extraction from tidal currents by flapping foil hydrokinetic turbines in tandem formation
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DOI：
10.1016/j.renene.2015.04.007
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发表时间：
2015-09
期刊：
影响因子：
8.7
通讯作者：
H. Karbasian;J. A. Esfahani;E. Barati
中科院分区：
文献类型：
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作者：
H. Karbasian;J. A. Esfahani;E. Barati
在本研究中，研究了多个串联拍动水翼获取动力的可能性。基于运动学和水动力学模型，开发了一个程序来预测不同扑翼数的水翼的功率提取能力。选定的水动力模型遵循二维准定常水动力不稳定性公式。结果表明，在低雷诺数的水流中也可以实现功率提取。作为在低速流中功率提取的结果，预测的最大功率效率也在较低的挥舞频率中。此外，研究发现，在串联编队中，所需的扑翼数是有限的，在第二次扑翼之后，功率影响率显著下降。下游的扑翼也承受着较高的水动力，而扑翼运动学是利用所提取动力的关键参数。作为这项调查的结果，所介绍的模型和代码可以被用来作为初始工具之一，以预测功率容量获得巨大的概念，潮汐网站与扑翼水动力涡轮机。
In the present study the power extraction possibility by a number of flapping hydrofoils in tandem formation is investigated. A code is developed to predict power extraction capacity for the various number of flapping hydrofoils based on the kinematic and hydrodynamic models. The selected hydrodynamic model follows two dimensional quasi-steady hydrodynamic instability formulation. It is shown that the power extraction is also possible from water stream with the low Reynolds number. As a result of power extraction at low speed flows, the predicted maximum power efficiency is also in lower flapping frequencies. Furthermore, it is found that there are limited number of required flapping hydrofoils in tandem formation, in which the power influence rate drops notably after the second flapping hydrofoil. The flapping hydrofoils at downstream also experience higher hydrodynamic forces, while the flapping hydrofoil kinematics is the key parameter to harness extracted power. As a result of this investigation, the introduced model and code can be used as one of initial tools to predict power capacity for obtaining vast concept regarding tidal sites with the flapping foil hydrokinetic turbines.