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Shear layer modelling with a finite element model - variants of the Munt problems

Shear layer modelling with a finite element model - variants of the Munt problems
Shear layer modelling with a finite element model - variants of the Munt problems
This paper describes an unusual application of a finite element code Actran, which was originally designed to simulate acoustic propagation in potential mean flows. The code is applied to the problem of duct mode radiation through an exhaust nozzle to the far-field; the effects of refraction across the jet shear layer are accounted for, this shear layer being represented as a vortex sheet. The first section presents details of a membrane model of the vortex sheet and a preliminary study of a simple problem which has been used to investigate the membrane parameters and to assess their effect on solutions in the near and far-field. The second section presents some comparisons with Munt-type analytic solutions to demonstrate the validity of this approach. In the third section, a methodology is outlined that will, in future, enable users of the Actran code to use this membrane representation of vortex sheets for more complex problems. Some preliminary results are given to illustrate its application.
Manera, Julien
fb8db005-0d0e-4e45-ab0f-eb2aac4e28d8
Lielens, Gregory
260d3c4c-1481-4240-adb8-c6ad2214b55a
Caro, Stéphane
417e47c2-f655-4204-81fb-9916ac9f7da5
Tester, Brian J.
1bd4a793-131b-4173-93cc-3eca70b2d116
De Mercato, Luigi
9e1a5624-c0c2-4a17-9f03-96c58719a161
Manera, Julien
fb8db005-0d0e-4e45-ab0f-eb2aac4e28d8
Lielens, Gregory
260d3c4c-1481-4240-adb8-c6ad2214b55a
Caro, Stéphane
417e47c2-f655-4204-81fb-9916ac9f7da5
Tester, Brian J.
1bd4a793-131b-4173-93cc-3eca70b2d116
De Mercato, Luigi
9e1a5624-c0c2-4a17-9f03-96c58719a161

Manera, Julien, Lielens, Gregory, Caro, Stéphane, Tester, Brian J. and De Mercato, Luigi (2007) Shear layer modelling with a finite element model - variants of the Munt problems. 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), Rome, Italy. 21 - 23 May 2007. 14 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper describes an unusual application of a finite element code Actran, which was originally designed to simulate acoustic propagation in potential mean flows. The code is applied to the problem of duct mode radiation through an exhaust nozzle to the far-field; the effects of refraction across the jet shear layer are accounted for, this shear layer being represented as a vortex sheet. The first section presents details of a membrane model of the vortex sheet and a preliminary study of a simple problem which has been used to investigate the membrane parameters and to assess their effect on solutions in the near and far-field. The second section presents some comparisons with Munt-type analytic solutions to demonstrate the validity of this approach. In the third section, a methodology is outlined that will, in future, enable users of the Actran code to use this membrane representation of vortex sheets for more complex problems. Some preliminary results are given to illustrate its application.

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More information

Published date: May 2007
Additional Information: AIAA 2007-3555
Venue - Dates: 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), Rome, Italy, 2007-05-21 - 2007-05-23

Identifiers

Local EPrints ID: 50431
URI: https://eprints.soton.ac.uk/id/eprint/50431
PURE UUID: 4cd0dd05-0222-4803-81aa-8985ffefdc73

Catalogue record

Date deposited: 26 Feb 2008
Last modified: 13 Mar 2019 20:51

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