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Robust validation of a generalised actuator disk CFD model for tidal turbine analysis using the FloWave ocean energy research facility

Charles Badoe, Matthew Edmunds, Alison Williams Orcid Logo, Anup Nambiar, Brian Sellar Orcid Logo, Aristides Kiprakis, Ian Masters Orcid Logo

Renewable Energy, Volume: 190, Pages: 232 - 250

Swansea University Authors: Charles Badoe, Matthew Edmunds, Alison Williams Orcid Logo, Ian Masters Orcid Logo

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Abstract

Coupled blade element momentum-computational fluid dynamic (BEM-CFD) approaches have been extensively used to study tidal stream turbine performance and wake development. These approaches have shown to be accurate when compared to tests conducted in tow-tanks or in regulated flumes with uniform flow...

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Published in: Renewable Energy
ISSN: 0960-1481
Published: Elsevier BV 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa59726
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Abstract: Coupled blade element momentum-computational fluid dynamic (BEM-CFD) approaches have been extensively used to study tidal stream turbine performance and wake development. These approaches have shown to be accurate when compared to tests conducted in tow-tanks or in regulated flumes with uniform flows across the turbine. Whilst such studies can be very useful, it is questionable as to what extent the results would differ in a larger scale environment where the flow is more representative of real-world conditions, being either unsteady or non-uniform. In this work, the effectiveness of a generalised actuator disk-computational fluid dynamics (GAD-CFD) approach in accurately capturing fluid-machine interaction for single and multiple tidal energy converters models is further assessed. A unique large-scale experimental facility, FloWave, has been used to conduct physical testing of three instrumented model tidal energy converters of rotor diameter 1.2 m under differing turbine layouts and realistic scaled environmental conditions. These large-scale tests provide a unique dataset against which this work's numerical simulations have been extensively validated. Comparisons between the tank and GAD-CFD approach show good agreement, particularly when comparing modelled to measured thrust, and enabled an evaluation of the effects of turbine spacing and arrangement on turbine performance and flow-field response.
Keywords: FloWave; GAD-CFD; Blade element momentum; Tidal energy; Tidal turbine; Horizontal axis turbine
College: College of Engineering
Funders: EPSRC, ERDF Ireland Wales Cooperation Programme
Start Page: 232
End Page: 250