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Experimental study on underwater fin-shaped piezoelectric energy harvester based on wake galloping

机译：基于XWAY疾驰的水下翅片压电能收割机的实验研究

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This paper presents a novel piezoelectric energy harvester based on wake galloping in water.This harvester consists of a bluff cylinder and a fin connected with a macro fiber composite(MFC)piezoelectric plate.The fluid flows through the upstream bluff cylinder and produces alternating shedding vortices behind it.Vortex shedding produces periodic crosswise vortex-induced force to drive the fin and piezoelectric plate vibrating to generate electricity.An experimental platform was established and several prototypes of energy harvesters were fabricated.The experimental results show that,under different flow velocity domains,the harvesting effect of the bluff cylinder with a diameter of 30 mm is the most ideal for the energy harvester with a fin length of 20,30 and 40 mm.When the fin length is 20 mm,the output voltage changes most smoothly.To obtain stable open circuit output voltage,the spacing distance between the bluff cylinder with a diameter of 25 mm and the fin should be controlled within 3D,while,the spacing distance between the bluff cylinder with a diameter of 30 mm and the fin should be controlled within 2D.When the bluff cylinder with a diameter of 30 mm,a spacing distance of 100 mm,and a flow velocity of 0.427 m/s,the maximum open circuit output voltage of 7.289 V can be obtained.The present work provides an effective experimental foundation for the research of underwater fin-shaped vehicle's dynamic endurance.
机译：此提出了一种基于唤醒在water.This舞动的新型的压电能量采集收割机由一个钝缸和鳍与宏纤维复合材料（MFC）压电plate.The流体流过所述上游非流线形气缸并产生交替旋涡脱落的连接在它背后.Vortex脱落产生周期性的横向涡旋诱导的力，以驱动翅片和压电板振动以产生电力。建立了实验平台，制造了几种能量收割机的原型。实验结果表明，在不同的流速域，直径为30毫米的凹槽气缸的收获效果是能源收割机的最适想，翅片长度为20,30和40毫米。当鳍长度为20毫米时，输出电压最平稳地变化。获取稳定的开路输出电压，凹槽之间的间距距离，直径为25毫米，脚蹼应控制Wi薄的3D，而直径为30mm和翅片的诈唬圆筒之间的间距距离应在2D内控制。直径为30毫米的诈唬气缸，间隔距离为100mm，以及流速0.427米/秒，最大开路输出电压为7.289 V.目前的作品为水下翅形式车辆动态耐久性的研究提供了有效的实验基础。

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