Investigation of the energy harvesting from deep water waves by using flexible piezoelectric eel in a controlled environment is studied. Energy harvesting potential is examined as a function of streamwise distance from the fixed cylinder and spanwise gap along with the cylinder at different wave conditions. Output voltage and eel flapping behavior are dependent on cylinder vortices caused by local wavelength and wave amplitude. Maximum energy is harvested when the eel is placed near to the surface caused by high flapping amplitude and frequency. Similarly, at greater depth low flapping amplitude is observed resulting in small output voltage. Maximum output voltages are found at the shorter wavelength and at a streamwise distance of gx = 1.25 (where gx is the ratio of spacing “S” between cylinder and eel to the diameter of cylinder “D”) for all spanwise gaps along with the cylinder and minimum voltages are calculated at a longer wavelength and streamwise distance gx = 0.75. An increase of 65% in energy harvesting is observed by switching longer wavelengths (λ) to a shorter one and changing the piezo-eel spanwise gap from deep to the shallow depth. Whereas, an increase of 31.5% was found by keeping wavelength constant and changing the spanwise gap of eel. Furthermore, it is observed that energy harvesting from the wake of a bluff body in the wavy motion of water is sensitive to the wavelength and wave height.

中文翻译：

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海浪作用下钝体尾流能量收集鳗的实验研究

研究了在受控环境中使用柔性压电鳗从深水波中收集能量的研究。在不同的波浪条件下，能量收集潜力被检查为与固定圆柱体的流向距离和跨度间隙以及圆柱体的函数。输出电压和鳗鱼拍打行为取决于由本地波长和波幅引起的圆柱涡流。当鳗鱼靠近水面时，会因高拍打幅度和频率而获得最大能量。类似地，在更深的深度观察到低摆动幅度，导致输出电压小。在较短的波长和 gx = 1 的流向距离处发现最大输出电压。25（其中 gx 是圆柱体和鳗鱼之间的间距“S”与圆柱体“D”直径的比率）对于所有展向间隙以及圆柱体，最小电压是在更长的波长和流向距离 gx = 0.75 下计算的。通过将较长的波长 (λ) 切换为较短的波长并将压电鳗展向间隙从深变浅，观察到能量收集增加了 65%。而通过保持波长恒定和改变鳗鱼展向间隙，发现增加了 31.5%。此外，据观察，在水的波浪运动中从钝体尾流中收集的能量对波长和波高很敏感。通过将较长的波长 (λ) 切换为较短的波长并将压电鳗展向间隙从深变浅，观察到能量收集增加了 65%。而通过保持波长恒定和改变鳗鱼展向间隙，发现增加了 31.5%。此外，据观察，在水的波浪运动中从钝体尾流中收集的能量对波长和波高很敏感。通过将较长的波长 (λ) 切换为较短的波长并将压电鳗展向间隙从深变浅，观察到能量收集增加了 65%。而通过保持波长恒定和改变鳗鱼展向间隙，发现增加了 31.5%。此外，据观察，在水的波浪运动中从钝体尾流中收集的能量对波长和波高很敏感。