The University of Southampton
University of Southampton Institutional Repository

Noise prediction of a shortcowl jet using energy transfer rate time-scale

Noise prediction of a shortcowl jet using energy transfer rate time-scale
Noise prediction of a shortcowl jet using energy transfer rate time-scale
Frequency dependency of the defining parameters in aero-acoustics has been a controversial issue and many theoretical and experimental studies have been directed towards its understanding and modelling. In this paper a new time scale based on the turbulent energy transfer rate is introduced and used along with the MGBK method for a short-cowl nozzle. The required CFD results for noise prediction are obtained using a modified k ? e turbulence model. Numerical results are provided for two flow working conditions, bypass velocity ratio 1 and 0.9. Besides the comparisons of the new time scale against the traditional time scale, namely dissipation time scale, corresponding noise prediction results at ninety degrees as well as other angles are compared and discussions are provides. Generally, results show that the new time scale is capable of performing the anticipated frequency dependency and has significantly improved noise prediction, particularly at low and high frequencies.
Azarpeyvand, M.
05191a9a-040a-45d2-a5d7-d4044b4c60ba
Self, R.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7
Azarpeyvand, M.
05191a9a-040a-45d2-a5d7-d4044b4c60ba
Self, R.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7

Azarpeyvand, M. and Self, R. (2008) Noise prediction of a shortcowl jet using energy transfer rate time-scale. Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference). 05 - 07 May 2008.

Record type: Conference or Workshop Item (Paper)

Abstract

Frequency dependency of the defining parameters in aero-acoustics has been a controversial issue and many theoretical and experimental studies have been directed towards its understanding and modelling. In this paper a new time scale based on the turbulent energy transfer rate is introduced and used along with the MGBK method for a short-cowl nozzle. The required CFD results for noise prediction are obtained using a modified k ? e turbulence model. Numerical results are provided for two flow working conditions, bypass velocity ratio 1 and 0.9. Besides the comparisons of the new time scale against the traditional time scale, namely dissipation time scale, corresponding noise prediction results at ninety degrees as well as other angles are compared and discussions are provides. Generally, results show that the new time scale is capable of performing the anticipated frequency dependency and has significantly improved noise prediction, particularly at low and high frequencies.

Full text not available from this repository.

More information

Published date: May 2008
Additional Information: Paper Number: AIAA-2008-2937
Venue - Dates: Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference), 2008-05-05 - 2008-05-07

Identifiers

Local EPrints ID: 57786
URI: https://eprints.soton.ac.uk/id/eprint/57786
PURE UUID: b30c9ce6-d95c-4fa0-be4b-6fc92a5a7110

Catalogue record

Date deposited: 20 Aug 2008
Last modified: 13 Mar 2019 20:33

Export record

Contributors

Author: M. Azarpeyvand
Author: R. Self

University divisions

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 https://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.

×