Simulation And Experiments Of Broadband Underwater Flow Induced Vibration Energy Harvesting Device

Global environmental pollution problems especially water contamination has become a great threat to human health during the rapid development of industry worldwide.Real-time monitoring of water quality is an important method in prevention and control of water pollution.Monitoring of water quality is an important part of water pollution control.However,it's difficult to make the replacement of battery for the water quality monitoring device,due to the untraveled areas where such devices are located.A broadband underwater flow induced vibration energy harvesting device based on Karman vortex with two degree of freedom piezoelectric vibrator has been proposed based on pervious works,whose harvesting performance has been study and discussed.A theoretical FSI(Fluid-Solid Interface)and piezoelectric couple field model of the two degrees of freedom piezoelectric vibrator is built based on Euler-Bernoulli beam theory and Coupled field theory.Then,the hydrodynamic characteristics of the broadband underwater flow induced vibration energy harvesting device has been analyzed by the commercial finite element analysis software COMSOL Multiphysics.Finally,an experimental platform has been built to research the energy harvesting performance of two degrees of freedom piezoelectric vibrators with different shapes and different structural parameters.The results show that the average power of the H type piezoelectric vibrator is 13.254 ?W which is higher than 7.512?W of the U type piezoelectric vibrator and 4.576 ?W of the folded piezoelectric vibrator.The results of this research provides a feasible solution for the energy supply of wireless sensor network node in micro field water detection...