Small-Scale Wind Energy Harvesting From Flow-Induced Vibrations

摘要: Significant wind energy exists in the boundary layers around naturally occurring and manmade structures. This source has remained largely untapped, even though it presents a significant of for powering wireless devices built-up areas. paper discusses study on harnessing from piezoelectric transducers by using bluff body vortex-induced vibration phenomena induced low-speed flows. The proposed are miniature, scalable, aeroelastic harvesters designed extracting turbulent, design configuration consists with flexible cantilever attached to trailing edge. In this design, transverse vibrations members alternating vortex shedding. multi-physics software package COMSOL is used coupled simulation fluid structural domains, Matlab couple deformations power harvesting circuitry. environmental parameters varied optimize identify design. lock-in phenomenon, which shedding frequency entrained fundamental frequency, exploited achieve resonance over range flow velocities, thus increasing velocity “bandwidth” devices. Simulations run different characteristic dimensions or shapes strength nature presence vibrating beam sections. results parameter variation presented discussed regard broadband harvesting.Copyright © 2011 ASME