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首页> 外文期刊>Energy Conversion & Management >Development of a novel vibro-wind galloping energy harvester with high power density incorporated with a nested bluff-body structure
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Development of a novel vibro-wind galloping energy harvester with high power density incorporated with a nested bluff-body structure

机译：新型高功率密度振动风驰gall能量采集器的开发，并结合了嵌套的钝体结构

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摘要

A two degrees of freedom (DOF) vibro-wind galloping energy harvester with a nested structure is proposed to improve wind energy harvesting efficiency. Unlike traditional wind energy harvesters configured in a single bluff body-beam structure, the proposed system comprises outer and inner square cross-sectional bluff bodies in tandem, connected with elastic cantilevered beams to allow separate oscillations. The generated power performance of a conventional single-DOF wind galloping energy harvester and the proposed system is compared through wind tunnel tests. Aerodynamic interactions between the two oscillating bluff bodies are analyzed by varying the gap distances and the coupling mechanism is determined by analyzing their power spectral density (PSD). Experimental results show that the outer bluff body has a dominant influence on the inner bluff body at low wind speed, which is a secondary cause of inner body vibration after the plain galloping directly induced by the incoming wind. The proposed system exhibits excellent performance with a significant power density increase of 27.8%. Moreover, the interference effects between the two bluff bodies can be reinforced by reducing their gap distance. We conclude that the inner bluff body plays a key role in enhancing output power, specifically at relatively high wind speed.
机译：提出了一种具有嵌套结构的两自由度（DOF）振动风驰电能量采集器，以提高风能采集效率。与配置在单个钝体梁结构中的传统风能采集器不同，所提出的系统包括串联在一起的外部和内部方形横截面钝体，并与弹性悬臂梁相连以实现独立的振动。通过风洞测试比较了传统的单自由度风驰电式能量采集器和所提出的系统的发电性能。通过改变间隙距离来分析两个振荡钝体之间的气动相互作用，并通过分析其功率谱密度（PSD）来确定耦合机制。实验结果表明，在低风速下，外部阻流体对内部阻流体具有主要影响，这是传入风直接引起平动驰after后内部振动的次要原因。所提出的系统具有出色的性能，功率密度显着提高了27.8％。此外，两个钝体之间的干涉效果可以通过减小其间隙距离来增强。我们得出的结论是，内部阻流体在提高输出功率方面起着关键作用，特别是在相对较高的风速下。

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