Abstract
This paper proposes and investigates a piezoelectric energy harvesting system based on the flow induced vibration of a piezoelectric composite cantilever pipe. Dynamic equations for the proposed energy harvester are derived considering the fluid-structure interaction and piezoelectric coupling vibration. Linear global stability analysis of the fluid-solid-electric coupled system is done using the numerical continuation method to find the neutrally stable vibration mode of the system. A measure of the energy harvesting efficiency of the system is proposed and analyzed. A series of simulations are conducted to throw light upon the influences of mass ratio, dimensionless electromechanical coupling, and dimensionless connected resistance upon the critical reduced velocity and the normalized energy harvesting efficiency. The results provide useful guidelines for the practical design of piezoelectric energy harvester based on fluid structure interaction and indicate some future topics to be investigated to optimize the device performance.
Highlights
The roaring development of engineering applications calls for more and more advanced sensors and sensor networks
Most the background research is based on the flow induced vibration of a piezoelectric composite beam in the externally surrounding flow, little attention is paid to the internal flow induced vibration of fluid conveying pipes, which is another popular topic in the field fluid structure interaction and flow induced vibration [22]
It shows that we must have a trade-off between the operation velocity range and normalized energy harvesting efficiency when choosing the appropriate mass ratio M∗
Summary
The roaring development of engineering applications calls for more and more advanced sensors and sensor networks. The steady fluid flow towards the bluff body will generate alternating vortices behind the bluff body This kind of alternating vortices will impose alternating forces upon the flexible piezoelectric composite eel and induce vibration in the eel, which can be used to extract energy from the fluid flow. Most the background research is based on the flow induced vibration of a piezoelectric composite beam in the externally surrounding flow, little attention is paid to the internal flow induced vibration of fluid conveying pipes, which is another popular topic in the field fluid structure interaction and flow induced vibration [22]. Results are discussed with guidelines for the design of practical systems and possible extensions of the present work explored
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