ENERGY HARVESTING EEL

The current study examines the feasibility of placing a piezoelectric membrane or “eel” in the wake of a bluff body and using the von Kármán vortex street forming behind the bluff body to induce oscillations in the membrane. The oscillations result in a capacitive buildup in the membrane that provid...

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Bibliographic Details
Published in:Journal of fluids and structures 2001-04, Vol.15 (3-4), p.629-640
Main Authors: ALLEN, J.J., SMITS, A.J.
Format: Article
Language:English
Subjects:
Applied fluid mechanics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Hydrodynamics, hydraulics, hydrostatics
Niobates, titanates, tantalates, pzt ceramics, etc
Physics
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Summary:The current study examines the feasibility of placing a piezoelectric membrane or “eel” in the wake of a bluff body and using the von Kármán vortex street forming behind the bluff body to induce oscillations in the membrane. The oscillations result in a capacitive buildup in the membrane that provides a voltage source that can be used, for example, to trickle-charge a battery in a remote location. The aim of the hydrodynamic testing is to maximize the strain energy and mechanical power by coupling the unsteady flow field with the vibration of the membrane. The requirement of optimal coupling is best defined as a resonance condition where the membrane has a negligible damping effect on the original von Kármán vortex street.
ISSN:0889-9746
1095-8622
DOI:10.1006/jfls.2000.0355