Hydrodynamic piezoelectric energy harvesting with strong shedding vortices by metasurface and wake-excited

被引：3
作者：
Sun, Weipeng [1 ]
Hu, Shen [1 ,2 ]
Kou, Lin [3 ]
Liu, Chenhan [1 ]
Zhao, Daoli [1 ]
机构：
[1] Xian Univ Technol, Inst Water Resources & Hydroelect Engn, Xian 710048, Peoples R China
[2] HuaDian Elect Power Res Inst Co Ltd, Hangzhou 310030, Peoples R China
[3] Xian Thermal Power Res Inst Co ltd, Xian 710054, Peoples R China
来源：
ENERGY AND BUILDINGS | 2023年 / 297卷
关键词：
Piezoelectric water energy harvester; Wake-excited; Metasurface; Shedding vortices; Optimal design; TANDEM CIRCULAR-CYLINDERS; VORTEX-INDUCED VIBRATIONS; PERFORMANCE;
D O I：
10.1016/j.enbuild.2023.113430
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Metasurface can affect the transverse oscillation of single cylinder in water, and the vibration will be more complex when interference cylinder is introduced. To analyze the behavior of the cylinder with wrapped- metasurface under wake-excited and to find an optimal design for energy harvesting, a segmented parametric model considering wake-excited is proposed. The wake-excitation coefficient is introduced to obtain the hydrodynamic force, and the electro-mechanical coupling dynamic model of harvester is established by extended Hamilton's principle and Gauss' law, the analytical solutions of output voltage and vibration displacement are obtained by decoupling model. The actual output is derived from water channel experiment, which verifies the model accuracy. The results show that the application of metasurface cancels the cylindrical "Lock-in" interval. Compared to the 'Isolated cylinder' case, the output voltage is 17.63 V and amplified by 15.47 times when spacing ratio is 1.8 and metasurface is the semi-elliptical feature. The numerical simulation explains that the simultaneous application of metasurface and wake-excited induces stronger shedding vortices, which significantly enhances the energy harvesting.
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页数：11
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