A nonlinear energy harvesting system consisting of a flapping foil and an electro-magnetic generator excited by incompressible quasi-steady air flows is investigated. Due to stiffness nonlinearities in pitch and/or heave degrees of freedom, the system behaves a stable limit cycle oscillation when flow velocity exceeds the critical flutter speed, so that the mechanical energy imported from air flow is converted into electricity by the coupled electro-magnetic generator. The power flow equations and variables, including the input, dissipated, transmitted and harnessed powers, of the system are formulated. A fourth-order Runge-Kutta method is used to obtain the system’s dynamical response as well as power flow variables. It shows that increasing the nonlinear stiffness in heave motion or decreasing in pitch motion benefits power generation. The research demonstrates the capability of this nonlinear system to harvest natural energy without extra operation cost. Discussions and planed further research works are given for engineering applications.
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ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 28–31, 2011
Washington, DC, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
978-0-7918-5478-5
PROCEEDINGS PAPER
Investigations on a Nonlinear Energy Harvesting System Consisting of a Flapping Foil and an Electro-Magnetic Generator Using Power Flow Analysis
J. Yang,
J. Yang
University of Southampton, Southampton, UK
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Y. P. Xiong,
Y. P. Xiong
University of Southampton, Southampton, UK
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J. T. Xing
J. T. Xing
University of Southampton, Southampton, UK
Search for other works by this author on:
J. Yang
University of Southampton, Southampton, UK
Y. P. Xiong
University of Southampton, Southampton, UK
J. T. Xing
University of Southampton, Southampton, UK
Paper No:
DETC2011-48445, pp. 317-324; 8 pages
Published Online:
June 12, 2012
Citation
Yang, J, Xiong, YP, & Xing, JT. "Investigations on a Nonlinear Energy Harvesting System Consisting of a Flapping Foil and an Electro-Magnetic Generator Using Power Flow Analysis." Proceedings of the ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 1: 23rd Biennial Conference on Mechanical Vibration and Noise, Parts A and B. Washington, DC, USA. August 28–31, 2011. pp. 317-324. ASME. https://doi.org/10.1115/DETC2011-48445
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