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Prediction methods for propagation in bypass ducts and comparison with measured data

Prediction methods for propagation in bypass ducts and comparison with measured data
Prediction methods for propagation in bypass ducts and comparison with measured data
A hybrid numerical procedure is presented for predicting the propagation and radiation of fan noise from aero-engine bypass ducts. In this approach, an accurate in-duct finite element model which captures well the physics of multimode propagation within the duct, is coupled to a more approximate radiation model in the external domain. The objective is to develop a relatively simple scheme which can predict the effects of bypass duct geometry and acoustic treatments on the radiated sound at modest computational cost. Predictions of the attenuation and the far field directivity for no-flow prototype model bypass ducts are validated against test data.
bypass duct, acoustic liner, scattering, radiation, prediction methods
1-15
Sugimoto, R.
2e8b89ef-91d1-49e9-b739-929e06ce7ae4
Astley, R.J.
4b0af3c5-9fc5-4f66-ac24-3a109c92e929
DeMercato, L.K.R.
c9537642-9d68-405f-911a-699062093d36
Jurdic, V.
37a5b11b-d9c0-4cb9-8930-532988d27007
Sugimoto, R.
2e8b89ef-91d1-49e9-b739-929e06ce7ae4
Astley, R.J.
4b0af3c5-9fc5-4f66-ac24-3a109c92e929
DeMercato, L.K.R.
c9537642-9d68-405f-911a-699062093d36
Jurdic, V.
37a5b11b-d9c0-4cb9-8930-532988d27007

Sugimoto, R., Astley, R.J., DeMercato, L.K.R. and Jurdic, V. (2005) Prediction methods for propagation in bypass ducts and comparison with measured data. 11th AIAA/CEAS Aeroacoustics Conference. 23 - 25 May 2005. pp. 1-15 .

Record type: Conference or Workshop Item (Paper)

Abstract

A hybrid numerical procedure is presented for predicting the propagation and radiation of fan noise from aero-engine bypass ducts. In this approach, an accurate in-duct finite element model which captures well the physics of multimode propagation within the duct, is coupled to a more approximate radiation model in the external domain. The objective is to develop a relatively simple scheme which can predict the effects of bypass duct geometry and acoustic treatments on the radiated sound at modest computational cost. Predictions of the attenuation and the far field directivity for no-flow prototype model bypass ducts are validated against test data.

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More information

Published date: 2005
Venue - Dates: 11th AIAA/CEAS Aeroacoustics Conference, 2005-05-23 - 2005-05-25
Keywords: bypass duct, acoustic liner, scattering, radiation, prediction methods

Identifiers

Local EPrints ID: 28381
URI: https://eprints.soton.ac.uk/id/eprint/28381
PURE UUID: 3c2f1d72-2f4d-4a59-bf9a-1dcb68a3a47c

Catalogue record

Date deposited: 02 May 2006
Last modified: 17 Jul 2017 16:01

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