On the prediction of "buzz-saw" noise in aero-engine inlet ducts
On the prediction of "buzz-saw" noise in aero-engine inlet ducts
"Buzz-saw" noise radiated from an aero-engine inlet duct occurs when the relative speed of the inlet flow impinging on the fan blades is supersonic. The pressure field attached to a supersonic ducted fan, in a direction normal to the shock fronts, closely resembles a sawtooth waveform. The non-linear propagation of a high-amplitude sawtooth waveform spiralling around a duct is calculated by two numerical simulation models. The models and their validation are discussed critically. Results are presented comparing the numerical simulations with experimental data. Overall there is good agreement comparing the results of the simulations with the experimental data, and in particular, the "Buzz-saw" noise in a hard-walled aero-engine inlet duct is successfully predicted.
123-149
McAlpine, A.
aaf9e771-153d-4100-9e84-de4b14466ed7
Fisher, M.J.
9662c037-03c2-4a45-9b58-9b83fe5b323d
15 November 2001
McAlpine, A.
aaf9e771-153d-4100-9e84-de4b14466ed7
Fisher, M.J.
9662c037-03c2-4a45-9b58-9b83fe5b323d
McAlpine, A. and Fisher, M.J.
(2001)
On the prediction of "buzz-saw" noise in aero-engine inlet ducts.
Journal of Sound and Vibration, 248 (1), .
(doi:10.1006/jsvi.2001.3770).
Abstract
"Buzz-saw" noise radiated from an aero-engine inlet duct occurs when the relative speed of the inlet flow impinging on the fan blades is supersonic. The pressure field attached to a supersonic ducted fan, in a direction normal to the shock fronts, closely resembles a sawtooth waveform. The non-linear propagation of a high-amplitude sawtooth waveform spiralling around a duct is calculated by two numerical simulation models. The models and their validation are discussed critically. Results are presented comparing the numerical simulations with experimental data. Overall there is good agreement comparing the results of the simulations with the experimental data, and in particular, the "Buzz-saw" noise in a hard-walled aero-engine inlet duct is successfully predicted.
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Published date: 15 November 2001
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Local EPrints ID: 10234
URI: http://eprints.soton.ac.uk/id/eprint/10234
ISSN: 0022-460X
PURE UUID: adef7cb9-52ce-4e85-b0fa-20cb61003bd6
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Date deposited: 23 May 2005
Last modified: 16 Mar 2024 03:02
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Author:
M.J. Fisher
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