Multi-mode sound propagation in pod silencers

Kirby, R

Multi-mode sound propagation in pod silencers

Kirby, R

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Publication Type:: Conference Proceeding
Citation:: 13th International Congress on Sound and Vibration 2006, ICSV 2006, 2006, 2 pp. 1056 - 1063
Issue Date:: 2006-12-01

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Field	Value	Language
dc.contributor.author	Kirby, R https://orcid.org/0000-0002-3520-1377	en_US
dc.date.issued	2006-12-01	en_US
dc.identifier.citation	13th International Congress on Sound and Vibration 2006, ICSV 2006, 2006, 2 pp. 1056 - 1063	en_US
dc.identifier.isbn	9781627481502	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117889
dc.description.abstract	Pod silencers are dissipative silencers used in HVAC applications in which the absorptive material is used to line the outer wall of the duct and a central cylindrical pod is inserted to form a silencer with an annular flow passage. Pod silencers are used in a wide range of ductwork, from the relatively small to very large applications with duct diameters of the order of several metres, and so in general silencer performance is likely to be influenced by higher order mode propagation. Accordingly, a numerical mode matching technique is used here to model higher order mode propagation in a pod silencer. A comparison of predictions with those previously found assuming plane wave propagation is presented and it is demonstrated that, even for relatively small silencers, higher order modes play an important role in the performance of pod silencers.	en_US
dc.relation.ispartof	13th International Congress on Sound and Vibration 2006, ICSV 2006	en_US
dc.title	Multi-mode sound propagation in pod silencers	en_US
dc.type	Conference Proceeding
utslib.citation.volume	2	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	2	en_US

Abstract:

Pod silencers are dissipative silencers used in HVAC applications in which the absorptive material is used to line the outer wall of the duct and a central cylindrical pod is inserted to form a silencer with an annular flow passage. Pod silencers are used in a wide range of ductwork, from the relatively small to very large applications with duct diameters of the order of several metres, and so in general silencer performance is likely to be influenced by higher order mode propagation. Accordingly, a numerical mode matching technique is used here to model higher order mode propagation in a pod silencer. A comparison of predictions with those previously found assuming plane wave propagation is presented and it is demonstrated that, even for relatively small silencers, higher order modes play an important role in the performance of pod silencers.

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http://hdl.handle.net/10453/117889