Direct numerical simulation of turbulent flow with an impedance condition
Direct numerical simulation of turbulent flow with an impedance condition
DNS solutions for a pipe/jet configuration are re-computed with the pipe alone to investigate suppression of previously identified internal noise source(s) with an acoustic liner, using a time domain acoustic liner model developed by Tam and Auriault (AIAA Journal, 34 (1996) 913–917). Liner design parameters are chosen to achieve up to 30 dB attenuation of the broadband pressure field over the pipe length without affecting the velocity field statistics. To understand the effect of the liner on the acoustic and turbulent components of the unsteady wall pressure, an azimuthal/axial Fourier transform is applied and the acoustic and turbulent wavenumber regimes clearly identified. It is found that the spectral component occupying the turbulent wavenumber range is unaffected by the liner whereas the acoustic wavenumber components are strongly attenuated, with individual radial modes being evident as each cuts on with increasing Strouhal number.
28-37
Olivetti, Simone
a32f8792-2cda-41e9-ac1a-70904d894904
Sandberg, Richard D.
41d03f60-5d12-4f2d-a40a-8ff89ef01cfa
Tester, Brian J.
1bd4a793-131b-4173-93cc-3eca70b2d116
Olivetti, Simone
a32f8792-2cda-41e9-ac1a-70904d894904
Sandberg, Richard D.
41d03f60-5d12-4f2d-a40a-8ff89ef01cfa
Tester, Brian J.
1bd4a793-131b-4173-93cc-3eca70b2d116
Olivetti, Simone, Sandberg, Richard D. and Tester, Brian J.
(2015)
Direct numerical simulation of turbulent flow with an impedance condition.
Journal of Sound and Vibration, 344, .
(doi:10.1016/j.jsv.2015.01.039).
Abstract
DNS solutions for a pipe/jet configuration are re-computed with the pipe alone to investigate suppression of previously identified internal noise source(s) with an acoustic liner, using a time domain acoustic liner model developed by Tam and Auriault (AIAA Journal, 34 (1996) 913–917). Liner design parameters are chosen to achieve up to 30 dB attenuation of the broadband pressure field over the pipe length without affecting the velocity field statistics. To understand the effect of the liner on the acoustic and turbulent components of the unsteady wall pressure, an azimuthal/axial Fourier transform is applied and the acoustic and turbulent wavenumber regimes clearly identified. It is found that the spectral component occupying the turbulent wavenumber range is unaffected by the liner whereas the acoustic wavenumber components are strongly attenuated, with individual radial modes being evident as each cuts on with increasing Strouhal number.
Text
JSV_Paper
- Author's Original
Text
Olivetti Sandberg and Tester
- Version of Record
Restricted to Repository staff only
Request a copy
More information
Accepted/In Press date: 23 January 2015
e-pub ahead of print date: 16 February 2015
Identifiers
Local EPrints ID: 420783
URI: http://eprints.soton.ac.uk/id/eprint/420783
ISSN: 0022-460X
PURE UUID: f22864a4-fb89-44b0-9517-9f951e00e0aa
Catalogue record
Date deposited: 16 May 2018 16:30
Last modified: 15 Mar 2024 19:44
Export record
Altmetrics
Contributors
Author:
Richard D. Sandberg
Author:
Brian J. Tester
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