The University of Southampton
University of Southampton Institutional Repository

Acoustic near- to far-field characteristics of nozzle radiation through plug flow jets

Acoustic near- to far-field characteristics of nozzle radiation through plug flow jets
Acoustic near- to far-field characteristics of nozzle radiation through plug flow jets
This paper reports a theoretical and numerical study of the radiation of sound through jet exhausts. It focuses on the transition from near field to far field by considering the features of the near field solution and how these features translate to the far field. The main finding of this work is the importance (in some cases) of lateral waves radiating from the jet. While the presence of lateral waves has long been recognized, there has been no systematic investigation of the practical consequences of these waves in the prediction of sound propagation through jet mixing layers. The physical mechanisms involved in the generation of these waves are presented as well as the conditions under which they become significant. This paper also discusses the validity of the far-field approximation when lateral waves are present. It is shown that the standard far-field asymptotic can be improved by adding a correction term which accounts for the presence of the lateral waves.
Gabard, G.
bfd82aee-20f2-4e2c-ad92-087dc8ff6ce7
Tester, B.J.
1bd4a793-131b-4173-93cc-3eca70b2d116
De Mercato, L.
0be28cbb-dae1-49b8-847b-62683ef86231
Gabard, G.
bfd82aee-20f2-4e2c-ad92-087dc8ff6ce7
Tester, B.J.
1bd4a793-131b-4173-93cc-3eca70b2d116
De Mercato, L.
0be28cbb-dae1-49b8-847b-62683ef86231

Gabard, G., Tester, B.J. and De Mercato, L. (2007) Acoustic near- to far-field characteristics of nozzle radiation through plug flow jets. 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), , Rome, Italy. 20 - 22 May 2007. 13 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper reports a theoretical and numerical study of the radiation of sound through jet exhausts. It focuses on the transition from near field to far field by considering the features of the near field solution and how these features translate to the far field. The main finding of this work is the importance (in some cases) of lateral waves radiating from the jet. While the presence of lateral waves has long been recognized, there has been no systematic investigation of the practical consequences of these waves in the prediction of sound propagation through jet mixing layers. The physical mechanisms involved in the generation of these waves are presented as well as the conditions under which they become significant. This paper also discusses the validity of the far-field approximation when lateral waves are present. It is shown that the standard far-field asymptotic can be improved by adding a correction term which accounts for the presence of the lateral waves.

This record has no associated files available for download.

More information

Published date: May 2007
Additional Information: AIAA 2007-3652
Venue - Dates: 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), , Rome, Italy, 2007-05-20 - 2007-05-22

Identifiers

Local EPrints ID: 50434
URI: http://eprints.soton.ac.uk/id/eprint/50434
PURE UUID: 5640e8af-6c38-4b70-891f-36c094567d8a

Catalogue record

Date deposited: 26 Feb 2008
Last modified: 08 Jan 2022 15:59

Export record

Contributors

Author: G. Gabard
Author: B.J. Tester
Author: L. De Mercato

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×