This ppppaper examines the performance of a galloping energy harvester possessing a nonlinear restoring force. To achieve this goal, a flow energy harvester consisting of a piezoelectric cantilever beam augmented with a square-sectioned bluff body at the free end is considered. Two magnets located near the tip of the bluff body are used to introduce the nonlinearity which strength and nature can be altered by changing the distance between the magnets. A lumped-parameter aero-electromechanical model adopting the quasi-steady assumption for aerodynamic loading is presented and utilized to numerically simulate the harvester’s response. Wind tunnel tests are also performed to validate the numerical simulations by conducting upward and downward wind velocity sweeps. Results comparing the relative performance of several harvesters with potential functions of different shapes demonstrate that a mono-stable potential function with a hardening restoring force can outperform all other configurations.
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ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 8–10, 2014
Newport, Rhode Island, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4615-5
PROCEEDINGS PAPER
Flow Energy Harvesters With a Nonlinear Restoring Force
Ali H. Alhadidi,
Ali H. Alhadidi
Clemson University, Clemson, SC
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Mohammed F. Daqaq
Mohammed F. Daqaq
Clemson University, Clemson, SC
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Ali H. Alhadidi
Clemson University, Clemson, SC
Amin Bibo
Clemson University, Clemson, SC
Mohammed F. Daqaq
Clemson University, Clemson, SC
Paper No:
SMASIS2014-7445, V002T07A006; 7 pages
Published Online:
December 8, 2014
Citation
Alhadidi, AH, Bibo, A, & Daqaq, MF. "Flow Energy Harvesters With a Nonlinear Restoring Force." Proceedings of the ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 2: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bioinspired Smart Materials and Systems; Energy Harvesting. Newport, Rhode Island, USA. September 8–10, 2014. V002T07A006. ASME. https://doi.org/10.1115/SMASIS2014-7445
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