Improve the performance of a semi-active flapping airfoil power generator by adjusting both offsetting mass center displacement and changing pitching axis position

Zhu, J; Zhu, M; Zhang, T

Improve the performance of a semi-active flapping airfoil power generator by adjusting both offsetting mass center displacement and changing pitching axis position

Zhu, J Zhu, M Zhang, T

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Energy Reports, 2021, 7, pp. 5074-5085
Issue Date:: 2021-11-01

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Field	Value	Language
dc.contributor.author	Zhu, J
dc.contributor.author	Zhu, M
dc.contributor.author	Zhang, T
dc.date.accessioned	2022-05-04T21:55:10Z
dc.date.available	2022-05-04T21:55:10Z
dc.date.issued	2021-11-01
dc.identifier.citation	Energy Reports, 2021, 7, pp. 5074-5085
dc.identifier.issn	2352-4847
dc.identifier.issn	2352-4847
dc.identifier.uri	http://hdl.handle.net/10453/157017
dc.description.abstract	A comprehensive investigation was carried out in this study, to evaluate the effect of changing pitching axis position and offsetting mass center displacement on the power extraction performance of a semi-active flapping airfoil power generator (FAPG). Unlike previously published literature, the pitching axis position and the mass center position of the airfoil are not to be located at the same position in the current work. A numerical method for accurately simulating the interaction between the fluid and semi-active FAPG was developed and validated to fulfill this objective. The analysis results showed that the optimized pitching axis position and offsetting mass center displacement are found at the value of d c/2 and 0.15c respectively, and compared with the offsetting mass center displacement, the effect of the pitching axis position on the performance of the FAPG is weak. Vortex structure analysis found that the leading-edge vortex is promoted to separate at initial or middle flapping, and it is delayed to separate at down or up flapping, which is the characteristics of the enhanced power extraction performance airfoil.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Energy Reports
dc.relation.isbasedon	10.1016/j.egyr.2021.08.024
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0906 Electrical and Electronic Engineering, 0913 Mechanical Engineering
dc.title	Improve the performance of a semi-active flapping airfoil power generator by adjusting both offsetting mass center displacement and changing pitching axis position
dc.type	Journal Article
utslib.citation.volume	7
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	0913 Mechanical Engineering
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.date.updated	2022-05-04T21:55:07Z
pubs.publication-status	Published
pubs.volume	7

Abstract:

A comprehensive investigation was carried out in this study, to evaluate the effect of changing pitching axis position and offsetting mass center displacement on the power extraction performance of a semi-active flapping airfoil power generator (FAPG). Unlike previously published literature, the pitching axis position and the mass center position of the airfoil are not to be located at the same position in the current work. A numerical method for accurately simulating the interaction between the fluid and semi-active FAPG was developed and validated to fulfill this objective. The analysis results showed that the optimized pitching axis position and offsetting mass center displacement are found at the value of d c/2 and 0.15c respectively, and compared with the offsetting mass center displacement, the effect of the pitching axis position on the performance of the FAPG is weak. Vortex structure analysis found that the leading-edge vortex is promoted to separate at initial or middle flapping, and it is delayed to separate at down or up flapping, which is the characteristics of the enhanced power extraction performance airfoil.

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http://hdl.handle.net/10453/157017