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Finite element models for predicting the propagation and radiation of fan noise from turbofan engines

Finite element models for predicting the propagation and radiation of fan noise from turbofan engines
Finite element models for predicting the propagation and radiation of fan noise from turbofan engines
Finite Element methods are presented for predicting fan noise radiation from turbofan aero-engines. Fan noise is a major contributors to whole aircraft noise for current High-Bypass-Ratio (HBR) aero-engines. The work reported here seeks to develop robust prediction methods for forward and aft-radiated noise which can be used to study and optimize the acoustic design of engine ducts. The current article focusses on propagation through the by-pass duct. Two hybrid methods are described in which in-duct propagation is predicted by using two different Finite Element approaches. Both are designed to model the effects of non-axisymmetric liners within such ducts. In both cases, radiation is dealt with by matching an in-duct finite element solution at the exhaust plane to an analytic radiation model which takes into account refraction through the shear layer and reflection from a acoustically hard centrebody. Results will be presented to illustrate the capabilities of such models and a simple benchmark problem is presented in which the predictions obtained from each methods are compared for acoustic scattering by hard rectangular patch in a lined annular duct.
International Institute of Noise Control Engineering
Astley, Jeremy
cb7fed9f-a96a-4b58-8939-6db1010f9893
Sugimoto, Rie
cb8c880d-0be0-4efe-9990-c79faa8804f0
Gabard, Gwenael
bfd82aee-20f2-4e2c-ad92-087dc8ff6ce7
Tsuchiya, Naoki
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Tsutomu, Ooishi
252a8ee4-8233-4a84-9013-479753f37d89
Astley, Jeremy
cb7fed9f-a96a-4b58-8939-6db1010f9893
Sugimoto, Rie
cb8c880d-0be0-4efe-9990-c79faa8804f0
Gabard, Gwenael
bfd82aee-20f2-4e2c-ad92-087dc8ff6ce7
Tsuchiya, Naoki
b64136a0-d784-4437-a1f0-7c86a21379ff
Tsutomu, Ooishi
252a8ee4-8233-4a84-9013-479753f37d89

Astley, Jeremy, Sugimoto, Rie, Gabard, Gwenael, Tsuchiya, Naoki and Tsutomu, Ooishi (2006) Finite element models for predicting the propagation and radiation of fan noise from turbofan engines. In Proceedings of Inter-Noise 2006. International Institute of Noise Control Engineering..

Record type: Conference or Workshop Item (Paper)

Abstract

Finite Element methods are presented for predicting fan noise radiation from turbofan aero-engines. Fan noise is a major contributors to whole aircraft noise for current High-Bypass-Ratio (HBR) aero-engines. The work reported here seeks to develop robust prediction methods for forward and aft-radiated noise which can be used to study and optimize the acoustic design of engine ducts. The current article focusses on propagation through the by-pass duct. Two hybrid methods are described in which in-duct propagation is predicted by using two different Finite Element approaches. Both are designed to model the effects of non-axisymmetric liners within such ducts. In both cases, radiation is dealt with by matching an in-duct finite element solution at the exhaust plane to an analytic radiation model which takes into account refraction through the shear layer and reflection from a acoustically hard centrebody. Results will be presented to illustrate the capabilities of such models and a simple benchmark problem is presented in which the predictions obtained from each methods are compared for acoustic scattering by hard rectangular patch in a lined annular duct.

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More information

Published date: 2006
Additional Information: CD-ROM
Venue - Dates: 35th International Congress and Exposition on Noise Control Engineering (Inter-Noise 2006), 2006-12-03 - 2006-12-06

Identifiers

Local EPrints ID: 43465
URI: https://eprints.soton.ac.uk/id/eprint/43465
PURE UUID: 38ed4625-b371-4459-aea8-25ff6ce2bc1a

Catalogue record

Date deposited: 09 Feb 2007
Last modified: 22 Aug 2019 16:30

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