A scalable concept for micropower generation using flow-induced self-excited oscillations
Authors:
- 5 April 2010
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 96 (14) , 144103
Abstract
Inspired by music-playing harmonicas that create tones via oscillations of reeds when subjected to air blow, this paper entails a concept for microwind power generation using flow-induced self-excited oscillations of a piezoelectric beam embedded within a cavity. Specifically, when the volumetric flow rate of air past the beam exceeds a certain threshold, the energy pumped into the structure via nonlinear pressure forces offsets the system’s intrinsic damping setting the beam into self-sustained limit-cycle oscillations. The vibratory energy is then converted into electricity through principles of piezoelectricity. Experimental and theoretical results are presented demonstrating the feasibility of the proposed concept.Keywords
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