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Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence

Nur Syafiqah Jamaluddin Orcid Logo, Alper Celik Orcid Logo, Kabilan Baskaran, Djamel Rezgui Orcid Logo, Mahdi Azarpeyvand

Aerospace, Volume: 10, Issue: 6, Start page: 502

Swansea University Author: Alper Celik Orcid Logo

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DOI (Published version): 10.3390/aerospace10060502

Abstract

This paper presents an experimental investigation into the effects of turbulence ingestion on the aerodynamic noise characteristics of rotor blades in edgewise flight. A small-scaled, two-bladed rotor was used in the study. The test utilised two turbulence-generating grids, to generate turbulence in...

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Published in: Aerospace
ISSN: 2226-4310
Published: MDPI AG
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URI: https://cronfa.swan.ac.uk/Record/cronfa64019
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spelling v2 64019 2023-08-02 Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence 3cb1f558a4b194101105e9c1e8d59cbf 0000-0002-2492-4625 Alper Celik Alper Celik true false 2023-08-02 AERO This paper presents an experimental investigation into the effects of turbulence ingestion on the aerodynamic noise characteristics of rotor blades in edgewise flight. A small-scaled, two-bladed rotor was used in the study. The test utilised two turbulence-generating grids, to generate turbulence inflows with different characteristics, and to compare them to the baseline configuration of the laminar inflow. The experiments were set at forwarding edgewise flight configuration, with freestream inflow velocity ranging from 10 m/s to 22 m/s. Simultaneous measurements of far-field acoustic pressure and load were conducted, along with a separate flow measurement using particle image velocimetry. The acoustic spectra demonstrated a larger contribution to the tonal noise radiation at blade passing frequency, and to the broadband noise radiation at the mid-frequency domain, due to turbulence ingestion. However, the broadband responses in the high-frequency domain were comparable between the tested laminar and turbulence inflow cases, with similar broadband humps featuring in the acoustic spectra. The directivity patterns of the overall sound pressure level showed that the noise radiation was lowest near the plane of rotation, and highest downstream. Turbulence ingestion effects could also be seen in the elevated noise levels throughout the observation positions for the grid inflow cases, particularly at larger advance ratios. Journal Article Aerospace 10 6 502 MDPI AG 2226-4310 Rotor noise, turbulence ingestion, experimental aeroacoustics, edgewise flight, PIV measurement 0 0 0 0001-01-01 10.3390/aerospace10060502 http://dx.doi.org/10.3390/aerospace10060502 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University Another institution paid the OA fee This research was funded by The European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant agreement 82842—SilentProp project) and the Engineering and Physical Sciences Research Council (EPSRC) under grant reference number EP/S013024/1. 2023-09-13T16:26:15.2615223 2023-08-02T22:12:15.5042341 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Nur Syafiqah Jamaluddin 0000-0002-3677-3481 1 Alper Celik 0000-0002-2492-4625 2 Kabilan Baskaran 3 Djamel Rezgui 0000-0002-9442-4335 4 Mahdi Azarpeyvand 5 64019__28535__4cc62cc4295e403391f13f0b19643906.pdf 64019.VOR.pdf 2023-09-13T16:22:58.9081122 Output 5165522 application/pdf Version of Record true © 2023 by the authors. Licensee MDPI, Basel, Switzerland. Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0). true eng https://creativecommons.org/licenses/by/4.0/
title Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence
spellingShingle Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence
Alper Celik
title_short Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence
title_full Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence
title_fullStr Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence
title_full_unstemmed Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence
title_sort Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence
author_id_str_mv 3cb1f558a4b194101105e9c1e8d59cbf
author_id_fullname_str_mv 3cb1f558a4b194101105e9c1e8d59cbf_***_Alper Celik
author Alper Celik
author2 Nur Syafiqah Jamaluddin
Alper Celik
Kabilan Baskaran
Djamel Rezgui
Mahdi Azarpeyvand
format Journal article
container_title Aerospace
container_volume 10
container_issue 6
container_start_page 502
institution Swansea University
issn 2226-4310
doi_str_mv 10.3390/aerospace10060502
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 - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
url http://dx.doi.org/10.3390/aerospace10060502
document_store_str 1
active_str 0
description This paper presents an experimental investigation into the effects of turbulence ingestion on the aerodynamic noise characteristics of rotor blades in edgewise flight. A small-scaled, two-bladed rotor was used in the study. The test utilised two turbulence-generating grids, to generate turbulence inflows with different characteristics, and to compare them to the baseline configuration of the laminar inflow. The experiments were set at forwarding edgewise flight configuration, with freestream inflow velocity ranging from 10 m/s to 22 m/s. Simultaneous measurements of far-field acoustic pressure and load were conducted, along with a separate flow measurement using particle image velocimetry. The acoustic spectra demonstrated a larger contribution to the tonal noise radiation at blade passing frequency, and to the broadband noise radiation at the mid-frequency domain, due to turbulence ingestion. However, the broadband responses in the high-frequency domain were comparable between the tested laminar and turbulence inflow cases, with similar broadband humps featuring in the acoustic spectra. The directivity patterns of the overall sound pressure level showed that the noise radiation was lowest near the plane of rotation, and highest downstream. Turbulence ingestion effects could also be seen in the elevated noise levels throughout the observation positions for the grid inflow cases, particularly at larger advance ratios.
published_date 0001-01-01T16:26:17Z
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score 11.01628

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