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Proceedings Paper

Energy harvesting from flutter instabilities of heavy flags in water through ionic polymer metal composites
Author(s): Alberto Giacomello; Maurizio Porfiri
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Paper Abstract

In this paper, we analyze underwater energy harvesting from the flutter instability of a heavy flag hosting an ionic polymer metal composite (IPMC). The heavy flag comprises a highly compliant membrane with periodic metal reinforcements to maximize the weight and minimize the bending stiffness, thus promoting flutter at moderately low flow speed. An IPMC strip is mechanically attached to the host flag and connected to an external load. The entire structure is immersed in a background flow whose intensity is parametrically varied to explore the onset of flutter instability along with the relation between the vibration frequency and the mean flow speed. Manageable theoretical models for fluid-structure interaction and IPMC response are presented to inform the harvester design and interpret experimental data. Further, optimal parameters for energy scavenging maximization, including resistive load and flow conditions, are identified.

Paper Details

Date Published: 28 March 2011
PDF: 9 pages
Proc. SPIE 7976, Electroactive Polymer Actuators and Devices (EAPAD) 2011, 797608 (28 March 2011); doi: 10.1117/12.879856
Show Author Affiliations
Alberto Giacomello, Polytechnic Institute of New York Univ. (United States)
Maurizio Porfiri, Polytechnic Institute of New York Univ. (United States)

Published in SPIE Proceedings Vol. 7976:
Electroactive Polymer Actuators and Devices (EAPAD) 2011
Yoseph Bar-Cohen; Federico Carpi, Editor(s)

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