A multidimensional analytical study of sound attenuation in catalytic converters

Denia, FD; Baeza, L; Kirby, R; Selamet, A

A multidimensional analytical study of sound attenuation in catalytic converters

Denia, FD Baeza, L Kirby, R

Selamet, A

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Publication Type:: Conference Proceeding
Citation:: 39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010, 2010, 6 pp. 4977 - 4986
Issue Date:: 2010-12-01

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Field	Value	Language
dc.contributor.author	Denia, FD	en_US
dc.contributor.author	Baeza, L	en_US
dc.contributor.author	Kirby, R https://orcid.org/0000-0002-3520-1377	en_US
dc.contributor.author	Selamet, A	en_US
dc.date.issued	2010-12-01	en_US
dc.identifier.citation	39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010, 2010, 6 pp. 4977 - 4986	en_US
dc.identifier.isbn	9781617823961	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117883
dc.description.abstract	In this work, a multidimensional analytical model is presented for the sound attenuation assessment of axisymmetric catalytic converters. Bessel functions are considered for the circular ducts, while spherical Hankel and Legendre functions are used for the expansion/contraction tapered ducts. Two alternative modelling techniques are implemented and compared for the monolith: (1) An equivalent bulk reacting absorbent material, in which the wave propagation is determined by the effective complex and frequency dependent density and speed of sound; (2) A coupling approach between both sides of the ceramic monolith in which a plane wave transfer matrix is considered, therefore retaining only onedimensional propagation within the capillary ducts. Benchmarking of the developed analytical techniques with finite element calculations shows good agreement. The influence of several parameters on the sound attenuation of the catalyst is investigated.	en_US
dc.relation.ispartof	39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010	en_US
dc.title	A multidimensional analytical study of sound attenuation in catalytic converters	en_US
dc.type	Conference Proceeding
utslib.citation.volume	6	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	6	en_US

Abstract:

In this work, a multidimensional analytical model is presented for the sound attenuation assessment of axisymmetric catalytic converters. Bessel functions are considered for the circular ducts, while spherical Hankel and Legendre functions are used for the expansion/contraction tapered ducts. Two alternative modelling techniques are implemented and compared for the monolith: (1) An equivalent bulk reacting absorbent material, in which the wave propagation is determined by the effective complex and frequency dependent density and speed of sound; (2) A coupling approach between both sides of the ceramic monolith in which a plane wave transfer matrix is considered, therefore retaining only onedimensional propagation within the capillary ducts. Benchmarking of the developed analytical techniques with finite element calculations shows good agreement. The influence of several parameters on the sound attenuation of the catalyst is investigated.

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http://hdl.handle.net/10453/117883