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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/40648

Title: Technique to Analyze Characteristics of Turbomachinery Broadband Noise Sources
Other Titles: 16th AIAA/CEAS Aeroacoustics Conference
Author: BENNETT, GARETH
Sponsor: European Commission
Author's Homepage: http://people.tcd.ie/bennettg
Keywords: Turbomachinery
Broadband noise
Aerospace engineering
Issue Date: 2010
Citation: Werner Jürgens, Ulf Tapken, Benjamin Pardowitz, Philip Kausche, Gareth J. Bennett, Lars Enghardt, Technique to Analyze Characteristics of Turbomachinery Broadband Noise Sources, 16th AIAA/CEAS Aeroacoustics Conference, Stockholm, Sweden, 7-9 June, 2010
Abstract: In this paper an experimental technique for the decomposition of broadband ducted sound fields into their mode constituents is applied to two laboratory scale experimental setups. The broadband mode analysis technique is based on spectral coherences. In both cases, incoherent broadband sound fields were excited by means of a loudspeaker array. The results derived from the basic setup S1 were validated successfully with analytical findings. The second setup S2 mimics the fundamental arrangement in an aero-engine exhaust, consisting of a broadband sound source (an annular combustor ring) and a turbomachinery stage (the LP turbine). In between, microphone arrays are arranged to acquire the broadband sound fields. Sample results of setup S2 are presented analyzed by means of the new technique. The experimental outcome proves the usefulness of the analysis technique to help interpreting and understanding broadband sound propagation in turbomachinery flow ducts.
Description: PUBLISHED
Stockholm, Sweden
URI: http://hdl.handle.net/2262/40648
Appears in Collections:Mechanical & Manufacturing Eng (Scholarly Publications)

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