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Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race

Myriam Slama, Camille Choma Bex, Grégory Pinon, Michael Togneri Orcid Logo, Iestyn Evans

Energies, Volume: 14, Issue: 13, Start page: 3826

Swansea University Authors: Michael Togneri Orcid Logo, Iestyn Evans

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DOI (Published version): 10.3390/en14133826

Abstract

This study investigates the wake interaction of four full-scale three-bladed tidal turbines with different ambient turbulence conditions, in straight and yawed flows. A three-dimensional unsteady Lagrangian Vortex Blob software is used for the numerical simulations of the turbines’ wakes. In order t...

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Published in: Energies
ISSN: 1996-1073
Published: MDPI AG 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa57297
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spelling 2021-07-30T17:20:26.9897892 v2 57297 2021-07-12 Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race 7032d5a521c181cea18dbb759e1ffdeb 0000-0002-6820-1680 Michael Togneri Michael Togneri true false 989ef1ae933e831508e319171820fab5 Iestyn Evans Iestyn Evans true false 2021-07-12 MECH This study investigates the wake interaction of four full-scale three-bladed tidal turbines with different ambient turbulence conditions, in straight and yawed flows. A three-dimensional unsteady Lagrangian Vortex Blob software is used for the numerical simulations of the turbines’ wakes. In order to model the ambient turbulence in the Lagrangian Vortex Method formalism, a Synthetic Eddy Method is used. With this method, turbulent structures are added in the computational domain to generate a velocity field which statistically reproduces any ambient turbulence intensity and integral length scale. The influence of the size of the structures and their density (within the study volume) on the wake of a single turbine is studied. Good agreement is obtained between numerical and experimental results for a high turbulence intensity but too many structures can increase the numerical dissipation and reduce the wake extension. Numerical simulations of the four turbine array with the layout initially proposed for the NEPTHYD pilot farm are then presented. Two ambient turbulence intensities encountered in the Alderney Race and two integral length scales are tested with a straight flow. Finally, the wakes obtained for yawed flows with different angles are presented, highlighting turbine interactions. Journal Article Energies 14 13 3826 MDPI AG 1996-1073 numerical computations; vortex method; synthetic eddy method; turbulence; tidal energy converters 25 6 2021 2021-06-25 10.3390/en14133826 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2021-07-30T17:20:26.9897892 2021-07-12T09:00:04.3075132 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Myriam Slama 1 Camille Choma Bex 2 Grégory Pinon 3 Michael Togneri 0000-0002-6820-1680 4 Iestyn Evans 5 57297__20383__b968ccd5a0cb4f4aa5fd9645ef8ee08e.pdf 57297.pdf 2021-07-12T09:01:49.8205302 Output 4543285 application/pdf Version of Record true Copyright: © 2021 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license true eng http://creativecommons.org/licenses/by/4.0/
title Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race
spellingShingle Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race
Michael Togneri
Iestyn Evans
title_short Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race
title_full Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race
title_fullStr Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race
title_full_unstemmed Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race
title_sort Lagrangian Vortex Computations of a Four Tidal Turbine Array: An Example Based on the NEPTHYD Layout in the Alderney Race
author_id_str_mv 7032d5a521c181cea18dbb759e1ffdeb
989ef1ae933e831508e319171820fab5
author_id_fullname_str_mv 7032d5a521c181cea18dbb759e1ffdeb_***_Michael Togneri
989ef1ae933e831508e319171820fab5_***_Iestyn Evans
author Michael Togneri
Iestyn Evans
author2 Myriam Slama
Camille Choma Bex
Grégory Pinon
Michael Togneri
Iestyn Evans
format Journal article
container_title Energies
container_volume 14
container_issue 13
container_start_page 3826
publishDate 2021
institution Swansea University
issn 1996-1073
doi_str_mv 10.3390/en14133826
publisher MDPI AG
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 1
active_str 0
description This study investigates the wake interaction of four full-scale three-bladed tidal turbines with different ambient turbulence conditions, in straight and yawed flows. A three-dimensional unsteady Lagrangian Vortex Blob software is used for the numerical simulations of the turbines’ wakes. In order to model the ambient turbulence in the Lagrangian Vortex Method formalism, a Synthetic Eddy Method is used. With this method, turbulent structures are added in the computational domain to generate a velocity field which statistically reproduces any ambient turbulence intensity and integral length scale. The influence of the size of the structures and their density (within the study volume) on the wake of a single turbine is studied. Good agreement is obtained between numerical and experimental results for a high turbulence intensity but too many structures can increase the numerical dissipation and reduce the wake extension. Numerical simulations of the four turbine array with the layout initially proposed for the NEPTHYD pilot farm are then presented. Two ambient turbulence intensities encountered in the Alderney Race and two integral length scales are tested with a straight flow. Finally, the wakes obtained for yawed flows with different angles are presented, highlighting turbine interactions.
published_date 2021-06-25T04:12:56Z
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score 11.012678

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