Computer-aided liner optimization for broadband noise
Computer-aided liner optimization for broadband noise
In this article the attenuation of broadband noise in an acoustically-lined circular-section duct is investigated. The aim is to predict how an axially segmented liner influences the attenuation of broadband noise in an aero-engine intake. The sound field is modelled using a multi-modal representation, assuming an ensemble of uncorrelated modes over a wide range of frequencies. An optimization procedure based on a Response Surface Model is used to investigate the optimum uniform and axially-segmented acoustic liner that maximizes the attenuation of broadband noise. An approximate calculation of the Perceived Noise level (PNL) is used for the objective function. In this article the benefit of using an axially segmented liner instead of a uniform liner to attenuate broadband noise is demonstrated.
Lafronza, L.
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McAlpine, A.
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Keane, A.J.
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Astley, R.J.
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2004
Lafronza, L.
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McAlpine, A.
aaf9e771-153d-4100-9e84-de4b14466ed7
Keane, A.J.
26d7fa33-5415-4910-89d8-fb3620413def
Astley, R.J.
cb7fed9f-a96a-4b58-8939-6db1010f9893
Lafronza, L., McAlpine, A., Keane, A.J. and Astley, R.J.
(2004)
Computer-aided liner optimization for broadband noise.
10th AIAA/CEAS Aeroacoustics Conference, Manchester, UK, Manchester, United Kingdom.
10 - 12 May 2004.
11 pp
.
Record type:
Conference or Workshop Item
(Other)
Abstract
In this article the attenuation of broadband noise in an acoustically-lined circular-section duct is investigated. The aim is to predict how an axially segmented liner influences the attenuation of broadband noise in an aero-engine intake. The sound field is modelled using a multi-modal representation, assuming an ensemble of uncorrelated modes over a wide range of frequencies. An optimization procedure based on a Response Surface Model is used to investigate the optimum uniform and axially-segmented acoustic liner that maximizes the attenuation of broadband noise. An approximate calculation of the Perceived Noise level (PNL) is used for the objective function. In this article the benefit of using an axially segmented liner instead of a uniform liner to attenuate broadband noise is demonstrated.
Text
lafr_04.pdf
- Accepted Manuscript
More information
Published date: 2004
Additional Information:
AIAA 2004-3029
Venue - Dates:
10th AIAA/CEAS Aeroacoustics Conference, Manchester, UK, Manchester, United Kingdom, 2004-05-10 - 2004-05-12
Identifiers
Local EPrints ID: 10396
URI: http://eprints.soton.ac.uk/id/eprint/10396
PURE UUID: 88b2ad7c-cbad-4da6-b8c4-ddd1cb525799
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Date deposited: 06 Feb 2006
Last modified: 16 Mar 2024 03:02
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Contributors
Author:
L. Lafronza
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