The role of porous structure on airfoil turbulence interaction noise reduction

Bowen, L.; Celik, Alper; Westin, M. F.; Azarpeyvand, M.

doi:10.1063/5.0186501

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The role of porous structure on airfoil turbulence interaction noise reduction

L. Bowen

, Alper Celik

, M. F. Westin

, M. Azarpeyvand

Physics of Fluids, Volume: 36, Issue: 2

Swansea University Author: Alper Celik

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DOI (Published version): 10.1063/5.0186501

Abstract

Experiments are performed to investigate the effect of porous treatment structure used at the leading edge on the aerodynamic and aeroacoustic characteristics of a National Advisory Committee for Aeronautics (NACA) 0012 airfoil. Three different triply periodic minimal surface porous structures of co...

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Published in:	Physics of Fluids
ISSN:	1070-6631 1089-7666
Published:	AIP Publishing 2024
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa65597

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spelling	2024-04-04T13:27:58.7998816 v2 65597 2024-02-08 The role of porous structure on airfoil turbulence interaction noise reduction 3cb1f558a4b194101105e9c1e8d59cbf 0000-0002-2492-4625 Alper Celik Alper Celik true false 2024-02-08 ACEM Experiments are performed to investigate the effect of porous treatment structure used at the leading edge on the aerodynamic and aeroacoustic characteristics of a National Advisory Committee for Aeronautics (NACA) 0012 airfoil. Three different triply periodic minimal surface porous structures of constant porosity are studied to explore their effect on the flow field and the relationship between airfoil response and far-field noise. The results show that the ratio between the porous structure pore size and the length scale of the turbulent flow plays an important role in the noise reduction capability of a porous leading edge. Changes to the turbulent flow properties in the vicinity of the airfoil are assessed to characterize the contributing physical behavior responsible for far-field noise manipulation. Velocity field analysis in front of the leading edge demonstrates a pronounced difference among porous structures. Furthermore, close to the airfoil surface and off from the stagnation line, all porous leading edges demonstrate a marked reduction in the low-frequency content of the velocity fluctuations. These results demonstrate the importance of the airfoil leading edge region and not just the stagnation line. The strong link evident in pressure–velocity coherence analysis of the solid airfoil is broken by the introduction of the porous leading edge. Furthermore, the porous leading edges reduce the near-field to far-field pressure coherence in both magnitude and frequency range. Journal Article Physics of Fluids 36 2 AIP Publishing 1070-6631 1089-7666 7 2 2024 2024-02-07 10.1063/5.0186501 Data availability: The data that support the findings of this study are available from the corresponding author upon reasonable request. COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University Another institution paid the OA fee The first author (L.B.) would like to acknowledge the financial support of Embraer S.A. and an Engineering and Physical Sciences Research Council doctoral training partnership (EPSRC DTP). The second author (A.C.) was sponsored by EPSRC via Grant No. EP/ S013024/1 at the University of Bristol from 1/6/2020 to 1/12/2022. All authors would like to acknowledge the financial support of EPSRC via Grant No. EP/S013024/1. 2024-04-04T13:27:58.7998816 2024-02-08T12:57:56.8731596 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering L. Bowen 0000-0001-7513-428x 1 Alper Celik 0000-0002-2492-4625 2 M. F. Westin 0000-0001-9333-5835 3 M. Azarpeyvand 0000-0001-7826-7635 4 65597__29917__32e97a1d440f4ee781d72f15a162119b.pdf 65597.VOR.pdf 2024-04-04T13:26:17.7854099 Output 10012156 application/pdf Version of Record true Copyright: 2024 Author(s). Released under the terms of a Creative Commons Attribution (CC BY) license. true eng http://creativecommons.org/licenses/by/4.0/
title	The role of porous structure on airfoil turbulence interaction noise reduction
spellingShingle	The role of porous structure on airfoil turbulence interaction noise reduction Alper Celik
title_short	The role of porous structure on airfoil turbulence interaction noise reduction
title_full	The role of porous structure on airfoil turbulence interaction noise reduction
title_fullStr	The role of porous structure on airfoil turbulence interaction noise reduction
title_full_unstemmed	The role of porous structure on airfoil turbulence interaction noise reduction
title_sort	The role of porous structure on airfoil turbulence interaction noise reduction
author_id_str_mv	3cb1f558a4b194101105e9c1e8d59cbf
author_id_fullname_str_mv	3cb1f558a4b194101105e9c1e8d59cbf_***_Alper Celik
author	Alper Celik
author2	L. Bowen Alper Celik M. F. Westin M. Azarpeyvand
format	Journal article
container_title	Physics of Fluids
container_volume	36
container_issue	2
publishDate	2024
institution	Swansea University
issn	1070-6631 1089-7666
doi_str_mv	10.1063/5.0186501
publisher	AIP Publishing
college_str	Faculty of Science and Engineering
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department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
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description	Experiments are performed to investigate the effect of porous treatment structure used at the leading edge on the aerodynamic and aeroacoustic characteristics of a National Advisory Committee for Aeronautics (NACA) 0012 airfoil. Three different triply periodic minimal surface porous structures of constant porosity are studied to explore their effect on the flow field and the relationship between airfoil response and far-field noise. The results show that the ratio between the porous structure pore size and the length scale of the turbulent flow plays an important role in the noise reduction capability of a porous leading edge. Changes to the turbulent flow properties in the vicinity of the airfoil are assessed to characterize the contributing physical behavior responsible for far-field noise manipulation. Velocity field analysis in front of the leading edge demonstrates a pronounced difference among porous structures. Furthermore, close to the airfoil surface and off from the stagnation line, all porous leading edges demonstrate a marked reduction in the low-frequency content of the velocity fluctuations. These results demonstrate the importance of the airfoil leading edge region and not just the stagnation line. The strong link evident in pressure–velocity coherence analysis of the solid airfoil is broken by the introduction of the porous leading edge. Furthermore, the porous leading edges reduce the near-field to far-field pressure coherence in both magnitude and frequency range.
published_date	2024-02-07T08:22:17Z
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score	11.512506

The role of porous structure on airfoil turbulence interaction noise reduction

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