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Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack

Marinos Manolesos Orcid Logo, George Papadakis

Physics of Fluids, Volume: 33, Issue: 8, Start page: 085106

Swansea University Author: Marinos Manolesos Orcid Logo

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DOI (Published version): 10.1063/5.0055822

Abstract

Flatback airfoils are airfoils with a blunt trailing edge. They are currently commonly used in the inboard part of large wind turbine blades, as they offer a number of aerodynamic, structural, and aeroelastic benefits. However, the flow past them at high angles of attack (AoA) has received relativel...

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Published in: Physics of Fluids
ISSN: 1070-6631 1089-7666
Published: AIP Publishing 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa57298
first_indexed 2021-07-12T08:07:27Z
last_indexed 2021-12-02T04:14:20Z
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spelling 2021-12-01T10:53:03.1861662 v2 57298 2021-07-12 Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack 44a3e0d351ccd7a8365d5fc7c50c8778 0000-0002-5506-6061 Marinos Manolesos Marinos Manolesos true false 2021-07-12 ACEM Flatback airfoils are airfoils with a blunt trailing edge. They are currently commonly used in the inboard part of large wind turbine blades, as they offer a number of aerodynamic, structural, and aeroelastic benefits. However, the flow past them at high angles of attack (AoA) has received relatively little attention until now. This is important because they usually operate at high AoA at the inboard part of Wind Turbine blades. The present investigation uses Reynolds averaged Navier–Stokes (RANS) and hybrid RANS + large eddy simulation predictions to analyze the flow in question. The numerical results are validated against previously published wind tunnel experiments. The analysis reveals that to successfully simulate this flow, the spanwise extent of the computational domain is crucial, more so than the selection of the modeling approach. Additionally, a low-drag regime observed at angles of attack before stall is identified and analyzed in detail. Finally, the complex interaction between the three-dimensional separated flow beyond maximum lift (stall cells) with the vortex shedding from the blunt trailing edge is revealed. Journal Article Physics of Fluids 33 8 085106 AIP Publishing 1070-6631 1089-7666 3 8 2021 2021-08-03 10.1063/5.0055822 Erratum: “Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack” [Phys. Fluids 33, 085106 (2021)]: 10.1063/5.0068084 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University External research funder(s) paid the OA fee (includes OA grants disbursed by the Library) EPSRC HPC Wales, Supergen Early Career Researcher Fund Award, EP/S000747/1 2021-12-01T10:53:03.1861662 2021-07-12T09:05:22.5191147 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Marinos Manolesos 0000-0002-5506-6061 1 George Papadakis 2 57298__20624__baedbdb09a1b48d6aa886f39b07a00ed.pdf 57298.pdf 2021-08-16T10:00:45.5259873 Output 6823832 application/pdf Version of Record true ©2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license true eng https://creativecommons.org/licenses/by/4.0/
title Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack
spellingShingle Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack
Marinos Manolesos
title_short Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack
title_full Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack
title_fullStr Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack
title_full_unstemmed Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack
title_sort Investigation of the three-dimensional flow past a flatback wind turbine airfoil at high angles of attack
author_id_str_mv 44a3e0d351ccd7a8365d5fc7c50c8778
author_id_fullname_str_mv 44a3e0d351ccd7a8365d5fc7c50c8778_***_Marinos Manolesos
author Marinos Manolesos
author2 Marinos Manolesos
George Papadakis
format Journal article
container_title Physics of Fluids
container_volume 33
container_issue 8
container_start_page 085106
publishDate 2021
institution Swansea University
issn 1070-6631
1089-7666
doi_str_mv 10.1063/5.0055822
publisher AIP Publishing
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 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 Flatback airfoils are airfoils with a blunt trailing edge. They are currently commonly used in the inboard part of large wind turbine blades, as they offer a number of aerodynamic, structural, and aeroelastic benefits. However, the flow past them at high angles of attack (AoA) has received relatively little attention until now. This is important because they usually operate at high AoA at the inboard part of Wind Turbine blades. The present investigation uses Reynolds averaged Navier–Stokes (RANS) and hybrid RANS + large eddy simulation predictions to analyze the flow in question. The numerical results are validated against previously published wind tunnel experiments. The analysis reveals that to successfully simulate this flow, the spanwise extent of the computational domain is crucial, more so than the selection of the modeling approach. Additionally, a low-drag regime observed at angles of attack before stall is identified and analyzed in detail. Finally, the complex interaction between the three-dimensional separated flow beyond maximum lift (stall cells) with the vortex shedding from the blunt trailing edge is revealed.
published_date 2021-08-03T07:59:10Z
_version_ 1821300963177136128
score 11.047393

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