Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/9895
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dc.contributor.authorKirby, R-
dc.contributor.authorAmott, K-
dc.contributor.authorWilliams, PT-
dc.contributor.authorDuan, W-
dc.date.accessioned2015-01-21T15:58:09Z-
dc.date.available2014-12-02-
dc.date.available2015-01-21T15:58:09Z-
dc.date.issued2014-
dc.identifier.citationJournal of Sound and Vibration, 333 (24): 6295 - 6311, (2 December 2014)en_US
dc.identifier.issn0022-460X-
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0022460X14005756-
dc.identifier.urihttp://bura.brunel.ac.uk/handle/2438/9895-
dc.description.abstractDissipative splitter silencers are often used to reduce the noise emitted in ventilation and gas turbine systems. It is well known that the acoustic performance of a splitter silencer changes under the influence of the convective effects of a mean gas flow and so in this article a theoretical model is developed to include the effects of mean flow. The theoretical model is based on a hybrid finite element method which enables the inclusion of bull nose fairings and a perforated screen separating the mean gas flow from a bulk reacting porous material. Predictions are compared against experimental measurements obtained both with and without mean flow. Good agreement between prediction and measurement is generally observed in the absence of mean flow, although it is seen that for silencers with a low percentage open area the silencer insertion loss is over predicted at higher frequencies. When mean flow is present, problems with the experimental methodology are observed at relatively modest mean flow velocities, and so comparison between prediction and experiment is limited to relatively low face velocities. However, experiment and theory both show that the insertion loss reduces at low frequencies when mean flow is in the direction of sound propagation, and at high frequencies the influence of mean flow is generally much smaller. Following additional theoretical investigations it is concluded that the influence of mean flow on splitter silencer performance should be accounted for at low frequencies when silencer airway velocities are greater than about 20 m/s; however, at higher frequencies one may generally neglect the effect of mean flow, even at higher velocities. Predictions obtained using the hybrid method are also compared to a simplified point collocation approach and it is demonstrated that the computationally efficient point collocation method may be used to investigate the effects of mean flow in a splitter silencer without loss of accuracy.en_US
dc.format.extent6295 - 6311-
dc.format.extent6295 - 6311-
dc.format.extent6295 - 6311-
dc.languageeng-
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectSplitter silencersen_US
dc.subjectAcoustic performanceen_US
dc.subjectMean flowen_US
dc.titleOn the acoustic performance of rectangular splitter silencers in the presence of mean flowen_US
dc.typeArticleen_US
dc.identifier.doihttp://dx.doi.org/10.1016/j.jsv.2014.07.001-
dc.relation.isPartOfJournal of Sound and Vibration-
dc.relation.isPartOfJournal of Sound and Vibration-
dc.relation.isPartOfJournal of Sound and Vibration-
pubs.issue24-
pubs.issue24-
pubs.issue24-
pubs.volume333-
pubs.volume333-
pubs.volume333-
pubs.organisational-data/Brunel-
pubs.organisational-data/Brunel/Brunel Staff by College/Department/Division-
pubs.organisational-data/Brunel/Brunel Staff by College/Department/Division/College of Engineering, Design and Physical Sciences-
pubs.organisational-data/Brunel/Brunel Staff by College/Department/Division/College of Engineering, Design and Physical Sciences/Dept of Mechanical, Aerospace and Civil Engineering-
pubs.organisational-data/Brunel/Brunel Staff by College/Department/Division/College of Engineering, Design and Physical Sciences/Dept of Mechanical, Aerospace and Civil Engineering/Mechanical and Aerospace Engineering-
pubs.organisational-data/Brunel/Brunel Staff by Institute/Theme-
pubs.organisational-data/Brunel/Brunel Staff by Institute/Theme/Institute of Materials and Manufacturing-
pubs.organisational-data/Brunel/Brunel Staff by Institute/Theme/Institute of Materials and Manufacturing/Structural Integrity-
pubs.organisational-data/Brunel/University Research Centres and Groups-
pubs.organisational-data/Brunel/University Research Centres and Groups/Brunel Business School - URCs and Groups-
pubs.organisational-data/Brunel/University Research Centres and Groups/Brunel Business School - URCs and Groups/Centre for Research into Entrepreneurship, International Business and Innovation in Emerging Markets-
pubs.organisational-data/Brunel/University Research Centres and Groups/School of Health Sciences and Social Care - URCs and Groups-
pubs.organisational-data/Brunel/University Research Centres and Groups/School of Health Sciences and Social Care - URCs and Groups/Brunel Institute for Ageing Studies-
pubs.organisational-data/Brunel/University Research Centres and Groups/School of Health Sciences and Social Care - URCs and Groups/Brunel Institute of Cancer Genetics and Pharmacogenomics-
pubs.organisational-data/Brunel/University Research Centres and Groups/School of Health Sciences and Social Care - URCs and Groups/Centre for Systems and Synthetic Biology-
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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