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Prediction of boundary layer sound radiation from wall shear stresses using DNS data

Prediction of boundary layer sound radiation from wall shear stresses using DNS data
Prediction of boundary layer sound radiation from wall shear stresses using DNS data
Sound radiation from a plane turbulent boundary layer is investigated using databases from direct numerical simulations (DNS) of plane turbulent Poiseuille flow up to Reynolds number Re? = 1440. Correlation areas for fluctuating wall shear stresses are found to collapse on viscous scaling over the current Reynolds number range. The power spectral density of radiated pressure and the spectrum of radiated sound power, per unit wall area, are predicted in the low Mach number limit by solving a Ffowcs Williams–Hawkings type wave equation using a half-space Green function. The same DNS data are used to predict the spectrum of turbulent boundary layer noise measured in a diffuser downstream of a fully-developed channel flow [Greshinov & Mironov, Soviet Physics Acoustics, 29(4):257-280,1983]. The measured spectrum is higher at low frequencies, but converges with the prediction at high frequencies.
Hu, Z.W.
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Morfey, C.L.
0024d8cd-c788-4811-a470-57934fbdcf97
Hu, Z.W.
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Morfey, C.L.
0024d8cd-c788-4811-a470-57934fbdcf97

Hu, Z.W. and Morfey, C.L. (2006) Prediction of boundary layer sound radiation from wall shear stresses using DNS data. 12th AIAA/CEAS Aeroacoustics Conference (27th AIAA Aeroacoustics Conference). 08 - 10 May 2006. 10 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Sound radiation from a plane turbulent boundary layer is investigated using databases from direct numerical simulations (DNS) of plane turbulent Poiseuille flow up to Reynolds number Re? = 1440. Correlation areas for fluctuating wall shear stresses are found to collapse on viscous scaling over the current Reynolds number range. The power spectral density of radiated pressure and the spectrum of radiated sound power, per unit wall area, are predicted in the low Mach number limit by solving a Ffowcs Williams–Hawkings type wave equation using a half-space Green function. The same DNS data are used to predict the spectrum of turbulent boundary layer noise measured in a diffuser downstream of a fully-developed channel flow [Greshinov & Mironov, Soviet Physics Acoustics, 29(4):257-280,1983]. The measured spectrum is higher at low frequencies, but converges with the prediction at high frequencies.

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More information

Published date: 2006
Additional Information: AIAA 2006-2412
Venue - Dates: 12th AIAA/CEAS Aeroacoustics Conference (27th AIAA Aeroacoustics Conference), 2006-05-08 - 2006-05-10
Organisations: Aerodynamics & Flight Mechanics

Identifiers

Local EPrints ID: 41984
URI: https://eprints.soton.ac.uk/id/eprint/41984
PURE UUID: fa506d60-f2fe-4723-a98e-2608bdb91c1f
ORCID for C.L. Morfey: ORCID iD orcid.org/0000-0002-5107-0944

Catalogue record

Date deposited: 25 Oct 2006
Last modified: 20 Jul 2019 01:10

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