CFD modelling of a small–scale fixed multi–chamber OWC device

Shalby, M; Elhanafi, A; Walker, P; Dorrell, DG

CFD modelling of a small–scale fixed multi–chamber OWC device

Shalby, M

Elhanafi, A

Walker, P

Dorrell, DG

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Publication Type:: Journal Article
Citation:: Applied Ocean Research, 2019, 88 pp. 37 - 47
Issue Date:: 2019-07-01

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Field	Value	Language
dc.contributor.author	Shalby, M https://orcid.org/0000-0003-0177-5986	en_US
dc.contributor.author	Elhanafi, A https://orcid.org/0000-0001-7866-9036	en_US
dc.contributor.author	Walker, P https://orcid.org/0000-0003-3988-3966	en_US
dc.contributor.author	Dorrell, DG https://orcid.org/0000-0001-8060-3386	en_US
dc.date.available	2021-08-12T19:01:10Z
dc.date.issued	2019-07-01	en_US
dc.identifier.citation	Applied Ocean Research, 2019, 88 pp. 37 - 47	en_US
dc.identifier.issn	0141-1187	en_US
dc.identifier.uri	http://hdl.handle.net/10453/132985
dc.description.abstract	© 2019 Elsevier Ltd Wave Energy Converters (WECs)have excellent potential as a source of renewable energy that is yet to be commercially realised. Recent attention has focused on the installation of Oscillating Water Column (OWC)devices as a part of harbor walls to provide advantages of cost–sharing structures and proximity of power generation facilities to existing infrastructure. In this paper, an incompressible three–dimensional CFD model is constructed to simulate a fixed Multi–Chamber OWC (MC–OWC)device. The CFD model is validated; the simulation results are found to be in good agreement with experimental results obtained from a scale physical model tested in a wave tank. The validated CFD model is then used for a benchmark study of 96 numerical tests. These investigate the effects of the PTO damping caused by the power take–off (PTO)system on device performance. The performance is assessed for a range of regular wave heights and periods. The results demonstrate that a PTO system with an intermediate damping can be used for all chambers in the MC–OWC device for most wave period ranges, except for the long wave periods. These require a higher PTO damping. An increased incident wave height reduces the device capture width ratio, but there is a noticeable improvement for long wave periods.	en_US
dc.relation.ispartof	Applied Ocean Research	en_US
dc.relation.isbasedon	10.1016/j.apor.2019.04.003	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Civil Engineering	en_US
dc.title	CFD modelling of a small–scale fixed multi–chamber OWC device	en_US
dc.type	Journal Article
utslib.citation.volume	88	en_US
utslib.for	090703 Environmental Technologies	en_US
utslib.for	0405 Oceanography	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0914 Resources Engineering and Extractive Metallurgy	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	88	en_US

Abstract:

© 2019 Elsevier Ltd Wave Energy Converters (WECs)have excellent potential as a source of renewable energy that is yet to be commercially realised. Recent attention has focused on the installation of Oscillating Water Column (OWC)devices as a part of harbor walls to provide advantages of cost–sharing structures and proximity of power generation facilities to existing infrastructure. In this paper, an incompressible three–dimensional CFD model is constructed to simulate a fixed Multi–Chamber OWC (MC–OWC)device. The CFD model is validated; the simulation results are found to be in good agreement with experimental results obtained from a scale physical model tested in a wave tank. The validated CFD model is then used for a benchmark study of 96 numerical tests. These investigate the effects of the PTO damping caused by the power take–off (PTO)system on device performance. The performance is assessed for a range of regular wave heights and periods. The results demonstrate that a PTO system with an intermediate damping can be used for all chambers in the MC–OWC device for most wave period ranges, except for the long wave periods. These require a higher PTO damping. An increased incident wave height reduces the device capture width ratio, but there is a noticeable improvement for long wave periods.

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http://hdl.handle.net/10453/132985