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Investigations on a nonlinear energy harvesting system consisting of a flapping foil and an electro-magnetic generator using power flow analysis

Investigations on a nonlinear energy harvesting system consisting of a flapping foil and an electro-magnetic generator using power flow analysis
Investigations on a nonlinear energy harvesting system consisting of a flapping foil and an electro-magnetic generator using power flow analysis
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
wave energy harvesting, nonlinear oscillator, mathematicalmodelling
1-8
American Society Of Mechanical Engineers (ASME)
Yang, J.
03ecc588-0dc4-448f-a669-7c7838f6bd46
Xiong, Y.P.
51be8714-186e-4d2f-8e03-f44c428a4a49
Xing, J.T.
d4fe7ae0-2668-422a-8d89-9e66527835ce
Yang, J.
03ecc588-0dc4-448f-a669-7c7838f6bd46
Xiong, Y.P.
51be8714-186e-4d2f-8e03-f44c428a4a49
Xing, J.T.
d4fe7ae0-2668-422a-8d89-9e66527835ce

Yang, J., Xiong, Y.P. and Xing, J.T. (2011) Investigations on a nonlinear energy harvesting system consisting of a flapping foil and an electro-magnetic generator using power flow analysis. In Proceedings of the ASME 2011 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2011). American Society Of Mechanical Engineers (ASME). pp. 1-8 .

Record type: Conference or Workshop Item (Paper)

Abstract

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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Published date: 28 August 2011
Venue - Dates: ASME 2011 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2011), United States, 2011-08-28 - 2011-08-31
Keywords: wave energy harvesting, nonlinear oscillator, mathematicalmodelling
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 200835
URI: http://eprints.soton.ac.uk/id/eprint/200835
PURE UUID: 31aca3ff-b519-46d6-944d-50ab918e4c03
ORCID for Y.P. Xiong: ORCID iD orcid.org/0000-0002-0135-8464

Catalogue record

Date deposited: 27 Oct 2011 11:02
Last modified: 20 Jul 2019 01:07

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