This paper proposes a novel piezoelectric energy harvesting device driven by aeroelastic flutter vibrations of a simple pin connected flap and beam. The system is subject to a modal convergence flutter response above a critical wind speed and then oscillates in a limit cycle at higher wind speeds. A linearized analytical model of the device is derived to include the effects of the three-way coupling between the structural, unsteady aerodynamic, and electrical aspects of the system. A stability analysis of this model is presented to determine the frequency and wind speed at the onset of the flutter instability, which dictates the cut-in conditions for energy harvesting. In order to estimate the electrical output of the energy harvester, the amplitude and frequency of the flutter limit cycle are also investigated. The limit cycle behavior is simulated in the time domain with a semi-empirical nonlinear model that accounts for the effects of the dynamic stall over the flap at large deflections. Wind tunnel test results are presented to determine the empirical aerodynamic model coefficients and to characterize the power output and flutter frequency of the energy harvester as functions of incident wind speed.
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e-mail: mjb377@cornell.edu
e-mail: eg84@cornell.edu
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February 2011
Research Papers
Modeling and Testing of a Novel Aeroelastic Flutter Energy Harvester
Matthew Bryant,
Matthew Bryant
Laboratory for Intelligent Machine Systems, Sibley School of Mechanical and Aerospace Engineering,
e-mail: mjb377@cornell.edu
Cornell University
, Ithaca, NY 14853
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Ephrahim Garcia
Ephrahim Garcia
Visiting Scientist,
e-mail: eg84@cornell.edu
U.S. Department of Homeland Security
, Washington, DC 20528; Laboratory for Intelligent Machine Systems, Sibley School of Mechanical and Aerospace Engineering, Cornell University
, Ithaca, NY 14853
Search for other works by this author on:
Matthew Bryant
Laboratory for Intelligent Machine Systems, Sibley School of Mechanical and Aerospace Engineering,
Cornell University
, Ithaca, NY 14853e-mail: mjb377@cornell.edu
Ephrahim Garcia
Visiting Scientist,
U.S. Department of Homeland Security
, Washington, DC 20528; Laboratory for Intelligent Machine Systems, Sibley School of Mechanical and Aerospace Engineering, Cornell University
, Ithaca, NY 14853e-mail: eg84@cornell.edu
J. Vib. Acoust. Feb 2011, 133(1): 011010 (11 pages)
Published Online: January 26, 2011
Article history
Received:
February 17, 2010
Revised:
June 23, 2010
Online:
January 26, 2011
Published:
January 26, 2011
Citation
Bryant, M., and Garcia, E. (January 26, 2011). "Modeling and Testing of a Novel Aeroelastic Flutter Energy Harvester." ASME. J. Vib. Acoust. February 2011; 133(1): 011010. https://doi.org/10.1115/1.4002788
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