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Experimental characterisation of rotor noise in tandem configuration

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

Applied Acoustics, Volume: 222, Start page: 110053

Swansea University Author: Alper Celik Orcid Logo

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DOI (Published version): 10.1016/j.apacoust.2024.110053

Abstract

This paper presents a comprehensive investigation into the noise radiation characteristics of two rotors in a tandem configuration. Through an extensive experimental campaign, the study explores the effect of the separation distance between two rotors on the noise directivity patterns, spectral char...

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Published in: Applied Acoustics
ISSN: 0003-682X
Published: Elsevier BV 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa66475
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Through an extensive experimental campaign, the study explores the effect of the separation distance between two rotors on the noise directivity patterns, spectral characteristics and temporal features of the radiated noise under both hovering and edge-wise flight conditions. The directivity patterns of the overall sound pressure level obtained from the polar and side arrays demonstrate a dependence on the separation distance and advance ratio. Spectral characteristics elucidate the influence of separation distance on tonal and broadband energy content. While the high-frequency broadband noise increases for both hovering and edge-wise flight similarly, the low-frequency broadband energy strongly depends on the advance ratio and the rotor separation distance. The results reveal a distinct envelope in the design space, where the radiated broadband noise for tandem configurations can be minimized, offering potential insights for noise reduction strategies. 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spelling v2 66475 2024-05-20 Experimental characterisation of rotor noise in tandem configuration 3cb1f558a4b194101105e9c1e8d59cbf 0000-0002-2492-4625 Alper Celik Alper Celik true false 2024-05-20 ACEM This paper presents a comprehensive investigation into the noise radiation characteristics of two rotors in a tandem configuration. Through an extensive experimental campaign, the study explores the effect of the separation distance between two rotors on the noise directivity patterns, spectral characteristics and temporal features of the radiated noise under both hovering and edge-wise flight conditions. The directivity patterns of the overall sound pressure level obtained from the polar and side arrays demonstrate a dependence on the separation distance and advance ratio. Spectral characteristics elucidate the influence of separation distance on tonal and broadband energy content. While the high-frequency broadband noise increases for both hovering and edge-wise flight similarly, the low-frequency broadband energy strongly depends on the advance ratio and the rotor separation distance. The results reveal a distinct envelope in the design space, where the radiated broadband noise for tandem configurations can be minimized, offering potential insights for noise reduction strategies. Additionally, the wavelet analysis for tandem configurations reveals that the emitted noise at the first and second blade passing frequency is strongly intermittent with amplitude modulation, which shall be considered for annoyance perception. Journal Article Applied Acoustics 222 110053 Elsevier BV 0003-682X Rotor noise; Aeroacoustics; Tandem; Wind tunnel experiment; Urban air mobility 5 6 2024 2024-06-05 10.1016/j.apacoust.2024.110053 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University SU Library paid the OA fee (TA Institutional Deal) The first author would like to acknowledge the EPSRC (Engineering and Physical Sciences Research Council) for post-doctoral sponsorship at the University of Bristol from June 2020 to December 2021 (Grant No. EP/S013024/1). The second author would like to acknowledge the financial support of Majlis Amanah Rakyat Malaysia. All authors would like to acknowledge Horizon 2020 research and innovation programme under grant agreement number 882842 (SilentProp project). 2024-05-20T10:43:03.1828525 2024-05-20T10:39:13.8390642 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Alper Celik 0000-0002-2492-4625 1 Nur Syafiqah Jamaluddin 0000-0002-3677-3481 2 Kabilan Baskaran 0000-0003-2456-6933 3 Stefano Meloni 0000-0003-1532-7463 4 Djamel Rezgui 0000-0002-9442-4335 5 Mahdi Azarpeyvand 6 66475__30397__b32c387b03d34d1db9d564c4e272f72e.pdf 66475.VoR.pdf 2024-05-20T10:41:50.2825028 Output 7199964 application/pdf Version of Record true © 2024 The Author(s). This is an open access article under the CC BY license. true eng http://creativecommons.org/licenses/by/4.0/).
title Experimental characterisation of rotor noise in tandem configuration
spellingShingle Experimental characterisation of rotor noise in tandem configuration
Alper Celik
title_short Experimental characterisation of rotor noise in tandem configuration
title_full Experimental characterisation of rotor noise in tandem configuration
title_fullStr Experimental characterisation of rotor noise in tandem configuration
title_full_unstemmed Experimental characterisation of rotor noise in tandem configuration
title_sort Experimental characterisation of rotor noise in tandem configuration
author_id_str_mv 3cb1f558a4b194101105e9c1e8d59cbf
author_id_fullname_str_mv 3cb1f558a4b194101105e9c1e8d59cbf_***_Alper Celik
author Alper Celik
author2 Alper Celik
Nur Syafiqah Jamaluddin
Kabilan Baskaran
Stefano Meloni
Djamel Rezgui
Mahdi Azarpeyvand
format Journal article
container_title Applied Acoustics
container_volume 222
container_start_page 110053
publishDate 2024
institution Swansea University
issn 0003-682X
doi_str_mv 10.1016/j.apacoust.2024.110053
publisher Elsevier BV
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
document_store_str 1
active_str 0
description This paper presents a comprehensive investigation into the noise radiation characteristics of two rotors in a tandem configuration. Through an extensive experimental campaign, the study explores the effect of the separation distance between two rotors on the noise directivity patterns, spectral characteristics and temporal features of the radiated noise under both hovering and edge-wise flight conditions. The directivity patterns of the overall sound pressure level obtained from the polar and side arrays demonstrate a dependence on the separation distance and advance ratio. Spectral characteristics elucidate the influence of separation distance on tonal and broadband energy content. While the high-frequency broadband noise increases for both hovering and edge-wise flight similarly, the low-frequency broadband energy strongly depends on the advance ratio and the rotor separation distance. The results reveal a distinct envelope in the design space, where the radiated broadband noise for tandem configurations can be minimized, offering potential insights for noise reduction strategies. Additionally, the wavelet analysis for tandem configurations reveals that the emitted noise at the first and second blade passing frequency is strongly intermittent with amplitude modulation, which shall be considered for annoyance perception.
published_date 2024-06-05T10:43:02Z
_version_ 1799564225231716352
score 11.012678

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