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Article: Direction-adaptive energy harvesting with a guide wing under flow-induced oscillations

TitleDirection-adaptive energy harvesting with a guide wing under flow-induced oscillations
Authors
KeywordsEnergy harvester
Piezoelectric
Vortex shedding
Directional sensitivity
Vibration
Issue Date2019
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/energy
Citation
Energy, 2019, v. 187, article no. 115983 How to Cite?
AbstractOcean, as a natural system containing a tremendous amount of energy, can be used for either the large-scale power grid network or small-scale distributed off-grid electronic devices via the energy harvesting technology. As one low-cost and effective way to capture flow energy, the vortex induced vibration (VIV) energy harvesting is attracting more and more attention. However, the direction of water flow in a natural water environment is changeable while most existing VIV harvesters are limited by their directional sensitivity. These harvesters only respond to flow excitations from one fixed direction and become insufficient once the flow direction varies. In this paper, we take the lead to address the unidirectional sensitivity issue and propose a novel direction-adaptive energy harvester. We establish theoretical models to analyze the Kármán vortex street, the torque excitation, and the vortex-induced pressure oscillations. Prototypes are fabricated and tested to characterize the direction-adaptive capability of the proposed design under different flow conditions. The experiments demonstrate that the energy harvesting angle span is extended by the guide wing from 40° to 360° under a wide flow velocity range. The guide-wing method endows harvesters with an all-around multidirectional sensitivity, and thus will accelerate energy harvesters’ applications in oceans.
Persistent Identifierhttp://hdl.handle.net/10722/284900
ISSN
2020 Impact Factor: 7.147
2020 SCImago Journal Rankings: 1.961
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGong, Y-
dc.contributor.authorShan, X-
dc.contributor.authorLuo, X-
dc.contributor.authorPan, J-
dc.contributor.authorXie, T-
dc.contributor.authorYang, Z-
dc.date.accessioned2020-08-07T09:04:06Z-
dc.date.available2020-08-07T09:04:06Z-
dc.date.issued2019-
dc.identifier.citationEnergy, 2019, v. 187, article no. 115983-
dc.identifier.issn0360-5442-
dc.identifier.urihttp://hdl.handle.net/10722/284900-
dc.description.abstractOcean, as a natural system containing a tremendous amount of energy, can be used for either the large-scale power grid network or small-scale distributed off-grid electronic devices via the energy harvesting technology. As one low-cost and effective way to capture flow energy, the vortex induced vibration (VIV) energy harvesting is attracting more and more attention. However, the direction of water flow in a natural water environment is changeable while most existing VIV harvesters are limited by their directional sensitivity. These harvesters only respond to flow excitations from one fixed direction and become insufficient once the flow direction varies. In this paper, we take the lead to address the unidirectional sensitivity issue and propose a novel direction-adaptive energy harvester. We establish theoretical models to analyze the Kármán vortex street, the torque excitation, and the vortex-induced pressure oscillations. Prototypes are fabricated and tested to characterize the direction-adaptive capability of the proposed design under different flow conditions. The experiments demonstrate that the energy harvesting angle span is extended by the guide wing from 40° to 360° under a wide flow velocity range. The guide-wing method endows harvesters with an all-around multidirectional sensitivity, and thus will accelerate energy harvesters’ applications in oceans.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/energy-
dc.relation.ispartofEnergy-
dc.subjectEnergy harvester-
dc.subjectPiezoelectric-
dc.subjectVortex shedding-
dc.subjectDirectional sensitivity-
dc.subjectVibration-
dc.titleDirection-adaptive energy harvesting with a guide wing under flow-induced oscillations-
dc.typeArticle-
dc.identifier.emailPan, J: jpan@cs.hku.hk-
dc.identifier.authorityPan, J=rp01984-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.energy.2019.115983-
dc.identifier.scopuseid_2-s2.0-85071107981-
dc.identifier.hkuros312151-
dc.identifier.volume187-
dc.identifier.issue15-
dc.identifier.spagearticle no. 115983-
dc.identifier.epagearticle no. 115983-
dc.identifier.isiWOS:000496334500058-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl0360-5442-

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