To convert the kinetic energy from ocean currents into electrical energy
a piezoelectric energy harvesting system based on vortex-induced vibration (VIV) was designed. The structures of the bluff body and piezoelectric cantilever beam were optimized to increase the input fluid kinetic energy and output electrical energy. The vortex streets induced by six different bluff bodies were simulated and compared by using COMSOL software. Finally
the optimal bluff body was used to carry out fluid-solid-electric full coupling simulation. The influence of different Reynolds numbers on the lift and drag coefficients of the bluff body and the piezoelectric cantilever beam were analyzed and compared
as well as the open-circuit voltage (OCV) of the piezoelectric cantilever beam. The simulation results showed that the optimized piezoelectric energy harvesting structure can improve the output electrical energy of the energy harvesting system
and the OCV of the piezoelectric cantilever beam is 0.8 V under the condition of current velocity of 0.5 m/s and bluff body size of 0.02 m.
AKAYDIN H D, ELVIN N, ANDREOPOULOS Y.Energy harvesting from highly unsteady fluid flows using piezoelectric materials[J]. Journal of intelligent material systems and structures, 2010, 21(13): 1263-1278.
DAI H L, ABDELKEFI A, WANG L.Piezoelectric energy harvesting from concurrent vortex-induced vibrations and base excitations[J]. Nonlinear dynamics, 2014, 77(3): 967-981.
BEN AYED S, ABDELKEFI A, NAJAR F, et al.Design and performance of variable-shaped piezoelectric energy harvesters[J]. Journal of intelligent material systems and structures, 2014, 25(2): 174-186.
BIBO A, DAQAQ M F.Energy harvesting under combined aerodynamic and base excitations[J]. Journal of sound and vibration, 2013, 332(20): 5086-5102.
SUN W P, ZHAO D L, TAN T, et al.Low velocity water flow energy harvesting using vortex induced vibration and galloping[J]. Applied energy, 2019, 251: 113392.
QURESHİ F U Q, MUHTAROĞLU A, TUNCAY K. Sensitivity analysis for piezoelectric energy harvester and bluff body design toward underwater pipeline monitoring[J]. Journal of energy systems, 2017, 1(1): 10-20.
SONG R J, SHAN X B, LV F C, et al.A novel piezoelectric energy harvester using the macro fiber composite cantilever with a bicylinder in water[J]. Applied sciences, 2015, 5(4): 1942-1954.
WANG W, LI H N, YAO L Q.Static bending and vibration analysis of a rectangular functionally gradient piezoelectric plate on an elastic foundation[J]. Applied sciences, 2022, 12(3): 1517.
HWANG J Y, YANG K S, SUN S H.Reduction of flow-induced forces on a circular cylinder using a detached splitter plate[J]. Physics of fluids, 2003, 15(8): 2433-2436.
OZONO S.Flow control of vortex shedding by a short splitter plate asymmetrically arranged downstream of a cylinder[J]. Physics of fluids, 1999, 11(10): 2928-2934.
PAN F F, XU Z K, JIN L, et al.Designed simulation and experiment of a piezoelectric energy harvesting system based on vortex-induced vibration[J]. IEEE transactions on industry applications, 2017, 53(4): 3890-3897.
IGARASHI T.Flow resistance and strouhal number of a vortex shedder in a circular pipe[J]. Transactions of the Japan Society of Mechanical Engineers Series B, 1999, 65(629): 229-236.
GAO D L, CHEN W L, LI H, et al.Flow around a slotted circular cylinder at various angles of attack[J]. Experiments in fluids, 2017, 58(10): 132.
PANKANIN G L, KULIŃCZAK A, BERLIŃSKI J. Investigations of Karman vortex street using flow visualization and image processing[J]. Sensors and actuators A: physical, 2007, 138(2): 366-375.
杜小振, MBANGO-NGOMA P A, 常恒, 等. 流致涡激振动压电发电风能采集技术模拟研究[J]. 振动与冲击, 2022, 41(23): 168-174, 200.
MITTAL S.Effect of a “slip” splitter plate on vortex shedding from a cylinder[J]. Physics of fluids, 2003, 15(3): 817-820.
CHO J H, RICHARDS R F, BAHR D F, et al.Efficiency of energy conversion by piezoelectrics[J]. Applied physics letters, 2006, 89(10): 104107.