The University of Dublin | Trinity College -- Ollscoil Átha Cliath | Coláiste na Tríonóide
Trinity's Access to Research Archive
Home :: Log In :: Submit :: Alerts ::

School of Engineering >
Mechanical & Manufacturing Eng >
Mechanical & Manufacturing Eng (Scholarly Publications) >

Please use this identifier to cite or link to this item:

Title: Noise source identification for ducted fan systems
Author's Homepage:
Keywords: Mechanical & Manufacturing Engineering
Issue Date: 2008
Publisher: American Institute of Aeronautics and Astronautics
Citation: Bennett G. and Fitzpatrick J. ‘Noise source identification for ducted fan systems’ in American Institute of Aeronautics and Astronautics Journal, 46, (7), 2008, pp 1663-1674
Series/Report no.: American Institute of Aeronautics and Astronautics Journal
Abstract: Coherence based source analysis techniques can be used to identify the contribution of combustion noise in the exhaust of a jet engine and hence enable the design of noise reduction devices. However, when the combustion noise propagates in a non-linear fashion the identified contribution using ordinary coherence methods will be inaccurate. In this paper, an analysis technique to enable the contribution of linear and non-linear mechanisms to the propagated sound to be identified is reported. An experimental rig to study the propagation of noise through a rotor/stator set-up using a vane-axial fan mounted in a duct so that non-linear interactions between a sound source and the fan could be investigated is described. The technique which is used to identify a non-linear tone generated by the interaction of the rotor and a propagated tone is reported. The identification procedures are then applied to data from full scale turbo-fan engine tests instrumented with pressure transducers at the combustor can and in the hot-jet pipe with microphones in the near-field. At a particular power setting, the interaction between the combustion noise and the high pressure turbine was measured in the hot jet pipe. The analysis techniques enabled non-linear interactions to be identified and linear and non-linear coherent output powers to be determined.
Description: PUBLISHED
Appears in Collections:Mechanical & Manufacturing Eng (Scholarly Publications)

Files in This Item:

File Description SizeFormat
AIAA3693Journalc.pdfpublished (author copy) peer-reviewed1.41 MBAdobe PDFView/Open

This item is protected by original copyright

Please note: There is a known bug in some browsers that causes an error when a user tries to view large pdf file within the browser window. If you receive the message "The file is damaged and could not be repaired", please try one of the solutions linked below based on the browser you are using.

Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback