A weak-scattering model for turbine-tone haystacking outside the cone of silence


Powles, C.J., Tester, B.J. and McAlpine, A. (2011) A weak-scattering model for turbine-tone haystacking outside the cone of silence. International Journal of Aeroacoustics, 10, (1), 17-50. (doi:10.1260/1475-472X.10.1.17).

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Description/Abstract

We consider the scattering of sound by turbulence in a jet shear layer. The turbulent, time-varying inhomogeneities in the flow scatter tonal sound fields in such a way as to give spectral broadening, which decreases the level of the incident tone, but increases the broadband level around the frequency of the tone. The scattering process is modelled for observers outside the cone of silence of the jet, using high-frequency asymptotic methods and a weak-scattering assumption. An analytical model for the far-field power spectral density of the scattered field is derived, and the result is compared to experimental data. The model correctly predicts the behaviour of the scattered field as a function of jet velocity and tone frequency

Item Type: Article
ISSNs: 1475-472X (print)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
ePrint ID: 172729
Date Deposited: 28 Jan 2011 12:07
Last Modified: 27 Mar 2014 19:20
URI: http://eprints.soton.ac.uk/id/eprint/172729

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