The unsteady hydrodynamic response of lightly loaded tidal turbines

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dc.contributor.author Ha, TBN en
dc.contributor.author Sharma, Rajnish en
dc.date.accessioned 2019-10-21T02:40:14Z en
dc.date.issued 2020-03 en
dc.identifier.issn 1879-0682 en
dc.identifier.uri http://hdl.handle.net/2292/48588 en
dc.description.abstract An investigation on the unsteady hydrodynamic behaviour of a new scale model tidal turbine at the University of Auckland has been conducted, using FAST software from National Renewable Energy Laboratory. The turbine blades are designed to achieve the optimal angle of attack based on maximizing lift-to-drag ratio, and then the distribution of chord lengths and pitch angles is determined. In this way, a highly efficient but a lightly loaded tidal turbine model design utilizing the S814 profile, is achieved. Oscillatory motions of flows with single frequency over a range of current numbers and reduced frequencies have been considered. The investigation shows that the unsteadiness of the hydrodynamics on the blades is governed by the dynamic inflow phenomenon. The mean angle of attack along the blade is maintained at or very near the initial optimal value. The effects of the oscillatory frequency and velocity amplitude on the unsteady hydrodynamic loading are explored. A quasi-steady analysis is used to clarify the hydrodynamic response of the model as a lightly loaded rotor. A mathematical model is added to the investigation to analyse the role of the forcing components relative to oscillatory velocity and acceleration on the phase of the unsteady loading. en
dc.publisher Elsevier en
dc.relation.ispartofseries Renewable Energy en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title The unsteady hydrodynamic response of lightly loaded tidal turbines en
dc.type Journal Article en
dc.identifier.doi 10.1016/j.renene.2019.09.137 en
pubs.issue 1 en
pubs.begin-page 1959 en
pubs.volume 147 en
dc.rights.holder Copyright: The author en
pubs.end-page 1968 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 783743 en
pubs.org-id Engineering en
pubs.org-id Mechanical Engineering en
pubs.record-created-at-source-date 2019-10-09 en
pubs.online-publication-date 2019-10-09 en


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