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DES vs RANS: The flatback airfoil case

George Papadakis, Marinos Manolesos, Konstantinos Diakakis, Vasilis A. Riziotis

Journal of Physics: Conference Series, Volume: 1618, Start page: 052062

Swansea University Author: Marinos Manolesos

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Abstract

Using flatback airfoils at the root of wind turbine (WT) blades is becoming more popular as the WTs increase in size. The reason is that they provide significant aerodynamic, aeroelastic and structural benefits. However, due to the blunt trailing edge (TE), the wake of such airfoils is highly unstea...

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Published in: Journal of Physics: Conference Series
ISSN: 1742-6588 1742-6596
Published: IOP Publishing 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa55485
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first_indexed 2020-10-22T13:18:10Z
last_indexed 2020-12-11T04:19:46Z
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spelling 2020-12-10T14:13:16.0324181 v2 55485 2020-10-22 DES vs RANS: The flatback airfoil case 44a3e0d351ccd7a8365d5fc7c50c8778 Marinos Manolesos Marinos Manolesos true false 2020-10-22 FGSEN Using flatback airfoils at the root of wind turbine (WT) blades is becoming more popular as the WTs increase in size. The reason is that they provide significant aerodynamic, aeroelastic and structural benefits. However, due to the blunt trailing edge (TE), the wake of such airfoils is highly unsteady and rich in three-dimensional vortical structures. This poses significant challenges on the numerical simulation of the flow around them, given the highly unsteady, three-dimensional turbulent character of their wake. In this work, computational predictions for a flatback airfoil employing both RANS and DES approaches on three successively refined grids up to 25 million cells are compared with available experimental data. Results suggest that even though URANS and DDES are in good agreement in terms of lift and drag, RANS simulations fail to accurately capture the turbulent wake unsteady characteristics. Journal Article Journal of Physics: Conference Series 1618 052062 IOP Publishing 1742-6588 1742-6596 22 9 2020 2020-09-22 10.1088/1742-6596/1618/5/052062 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2020-12-10T14:13:16.0324181 2020-10-22T14:15:40.5825838 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised George Papadakis 1 Marinos Manolesos 2 Konstantinos Diakakis 3 Vasilis A. Riziotis 4 55485__18472__d5d7a01dbc4b4e08a34ecf964ec1653f.pdf 55485.pdf 2020-10-22T14:17:53.5574978 Output 6720300 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution 3.0 Licence. true eng http://creativecommons.org/licenses/by/3.0
title DES vs RANS: The flatback airfoil case
spellingShingle DES vs RANS: The flatback airfoil case
Marinos Manolesos
title_short DES vs RANS: The flatback airfoil case
title_full DES vs RANS: The flatback airfoil case
title_fullStr DES vs RANS: The flatback airfoil case
title_full_unstemmed DES vs RANS: The flatback airfoil case
title_sort DES vs RANS: The flatback airfoil case
author_id_str_mv 44a3e0d351ccd7a8365d5fc7c50c8778
author_id_fullname_str_mv 44a3e0d351ccd7a8365d5fc7c50c8778_***_Marinos Manolesos
author Marinos Manolesos
author2 George Papadakis
Marinos Manolesos
Konstantinos Diakakis
Vasilis A. Riziotis
format Journal article
container_title Journal of Physics: Conference Series
container_volume 1618
container_start_page 052062
publishDate 2020
institution Swansea University
issn 1742-6588
1742-6596
doi_str_mv 10.1088/1742-6596/1618/5/052062
publisher IOP Publishing
college_str Faculty of Science and Engineering
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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 Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Using flatback airfoils at the root of wind turbine (WT) blades is becoming more popular as the WTs increase in size. The reason is that they provide significant aerodynamic, aeroelastic and structural benefits. However, due to the blunt trailing edge (TE), the wake of such airfoils is highly unsteady and rich in three-dimensional vortical structures. This poses significant challenges on the numerical simulation of the flow around them, given the highly unsteady, three-dimensional turbulent character of their wake. In this work, computational predictions for a flatback airfoil employing both RANS and DES approaches on three successively refined grids up to 25 million cells are compared with available experimental data. Results suggest that even though URANS and DDES are in good agreement in terms of lift and drag, RANS simulations fail to accurately capture the turbulent wake unsteady characteristics.
published_date 2020-09-22T04:09:43Z
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score 10.99342