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Fan noise propagation within curved bypass ducts with 3D features

Fan noise propagation within curved bypass ducts with 3D features
Fan noise propagation within curved bypass ducts with 3D features
This paper focuses on aft radiated fan noise propagating through the bypass duct: the
effect of duct geometry on noise propagation is examined. The acoustic benefits of a novel
highly curved bypass geometry are compared with those of a typical modern turbofan
engine bypass geometry. Both 2D and 3D finite element models are used to examine the
effect of duct geometry and other features on noise propagation, including modal scattering
within the duct. An analytic radiation model is also used to examine the effect of these
features on sound directivity patterns in the far-field.
McAleer, C.
ecd57a3c-8390-48c5-909b-3b4fa929ea4e
Astley, R.J.
cb7fed9f-a96a-4b58-8939-6db1010f9893
Holland, K.R.
90dd842b-e3c8-45bb-865e-3e7da77ec703
Sugimoto, R.
cb8c880d-0be0-4efe-9990-c79faa8804f0
Kempton, A.
7bd2386b-d23f-4d0e-b996-19978b553e7a
McAleer, C.
ecd57a3c-8390-48c5-909b-3b4fa929ea4e
Astley, R.J.
cb7fed9f-a96a-4b58-8939-6db1010f9893
Holland, K.R.
90dd842b-e3c8-45bb-865e-3e7da77ec703
Sugimoto, R.
cb8c880d-0be0-4efe-9990-c79faa8804f0
Kempton, A.
7bd2386b-d23f-4d0e-b996-19978b553e7a

McAleer, C., Astley, R.J., Holland, K.R., Sugimoto, R. and Kempton, A. (2008) Fan noise propagation within curved bypass ducts with 3D features. Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference). 05 - 07 May 2008. 16 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper focuses on aft radiated fan noise propagating through the bypass duct: the
effect of duct geometry on noise propagation is examined. The acoustic benefits of a novel
highly curved bypass geometry are compared with those of a typical modern turbofan
engine bypass geometry. Both 2D and 3D finite element models are used to examine the
effect of duct geometry and other features on noise propagation, including modal scattering
within the duct. An analytic radiation model is also used to examine the effect of these
features on sound directivity patterns in the far-field.

Full text not available from this repository.

More information

Published date: May 2008
Additional Information: Paper Number: AIAA-2008-2878
Venue - Dates: Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference), 2008-05-05 - 2008-05-07

Identifiers

Local EPrints ID: 57783
URI: https://eprints.soton.ac.uk/id/eprint/57783
PURE UUID: 8a5f0d25-5f58-4ea7-abf8-95389363b235
ORCID for K.R. Holland: ORCID iD orcid.org/0000-0001-7439-2375

Catalogue record

Date deposited: 20 Aug 2008
Last modified: 20 Jul 2019 01:23

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