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A finite element scheme for attenuation in ducts lined with porous material: Comparison with experiment

A finite element scheme for attenuation in ducts lined with porous material: Comparison with experiment
A finite element scheme for attenuation in ducts lined with porous material: Comparison with experiment
A general finite element formulation for analysis of the sound field in a uniform flow duct with a bulk-reacting porous liner is given. Numerical results on rectangular ducts lined on all four sides are shown, and some of the lower order acoustic modes are described. Comparison is made between numerically predicted and measured values of modal axial attenuation rate, phase speed and transverse pressure profile both with and without mean airflow. Generally good agreement between prediction and measurement is observed.

0022-460X
239-263
Astley, R.J.
cb7fed9f-a96a-4b58-8939-6db1010f9893
Cummings, A.
1a1fff5a-2b19-42e4-8c67-ffa0433befd6
Astley, R.J.
cb7fed9f-a96a-4b58-8939-6db1010f9893
Cummings, A.
1a1fff5a-2b19-42e4-8c67-ffa0433befd6

Astley, R.J. and Cummings, A. (1987) A finite element scheme for attenuation in ducts lined with porous material: Comparison with experiment. Journal of Sound and Vibration, 116 (2), 239-263. (doi:10.1016/S0022-460X(87)81302-0).

Record type: Article

Abstract

A general finite element formulation for analysis of the sound field in a uniform flow duct with a bulk-reacting porous liner is given. Numerical results on rectangular ducts lined on all four sides are shown, and some of the lower order acoustic modes are described. Comparison is made between numerically predicted and measured values of modal axial attenuation rate, phase speed and transverse pressure profile both with and without mean airflow. Generally good agreement between prediction and measurement is observed.

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Published date: 22 July 1987

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Local EPrints ID: 166469
URI: http://eprints.soton.ac.uk/id/eprint/166469
DOI: doi:10.1016/S0022-460X(87)81302-0
ISSN: 0022-460X
PURE UUID: 04caf4fd-1e3c-410b-82dd-e923502a4d47

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Date deposited: 29 Oct 2010 08:14
Last modified: 14 Mar 2024 02:13

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Contributors

Author: R.J. Astley
Author: A. Cummings

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