Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3385780
Keywords
damping; oscillations; piezoelectricity; wind power plants
Categories
Funding
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1000667] Funding Source: National Science Foundation
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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.
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