CFD modelling of a tidal stream turbine subjected to profiled flow and surface gravity waves

Tatum, Sarah, Allmark, Matthew ORCID: https://orcid.org/0000-0002-6812-3571, Frost, Carwyn ORCID: https://orcid.org/0000-0002-8985-5579, O'Doherty, Daphne, Mason-Jones, Allan ORCID: https://orcid.org/0000-0002-1777-6679 and O'Doherty, Tim 2016. CFD modelling of a tidal stream turbine subjected to profiled flow and surface gravity waves. International Journal of Marine Energy' 15 , pp. 156-174. 10.1016/j.ijome.2016.04.003

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Abstract

This study used computational fluid dynamics to investigate the effect of waves and a velocity profile on the performance of a tidal stream turbine (TST). A full scale TST was transiently modelled operating near its maximum power point, and then subjected to waves both in and out of phase with its period of rotation. A profile was then added to one of the wave models. For this set of conditions it was found that the longer period and in-phase wave had a significant effect on the power range fluctuations, with more modest variations for thrust and the average values, although this is dependent on the turbine tip speed ratio. The addition of the profile had a strong effect on the bending moment. It has been concluded that a naturally varying sea state may yield a smoothing effect in this turbine response, but that with further structural investigation it may be that some measuring and mitigation techniques are required in the event of a predominantly single long period, in-phase wave.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Additional Information:	This is an open access article under the CC-BY license.
Publisher:	Elsevier
ISSN:	2214-1669
Funders:	EPSRC, FUJITSU, HPC Wales
Date of First Compliant Deposit:	27 April 2016
Date of Acceptance:	21 April 2016
Last Modified:	27 Sep 2023 14:11
URI:	https://orca.cardiff.ac.uk/id/eprint/90078

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