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Ferrous Fibre Network Materials for Jet Noise Reduction in Aeroengines Part I: Acoustic Effects
Author(s) -
Golosnoy I. O.,
Tan J. C.,
Clyne T. W.
Publication year - 2008
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200700302
Subject(s) - materials science , jet engine , acoustics , noise reduction , noise (video) , attenuation , ferrous , jet (fluid) , jet noise , reduction (mathematics) , acoustic attenuation , mechanics , mechanical engineering , optics , metallurgy , physics , engineering , computer science , geometry , mathematics , artificial intelligence , image (mathematics)
An investigation is presented into the acoustic effects of introducing tubular modules, made of highly porous ferrous materials, into the exhaust region of a gas turbine engine. It is shown that substantial reductions in noise level (up to ∼10 dB) can be achieved, at constant thrust. Such effects can arise both via modification to the gas flow field (and hence to noise generation characteristics) and by attenuation of acoustic waves within the modules.