Change search
ReferencesLink to record
Permanent link

Direct link
Aeroacoustics of duct branches: with application to silencers
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics.
2011 (English)In: SAE technical paper series, ISSN 0148-7191Article in journal (Refereed) Published
Abstract [en]

The inclusion of flow-acoustic interaction effects in linear acoustic multiport models has been studied. It is shown, using a T-junction as illustration example, that as long the acoustic system is linear the required information is included in a scattering matrix obtained by experimental or numerical studies. Assuming small Mach numbers and low frequencies-as in most automotive silencer applications-the scattering matrix for the T-junction can be approximated using quasi-steady models. Models are derived that holds for all possible configurations of grazing and bias flow in the T-junctions. The derived models are then used to predict the performance of a novel silencer concept, where a resonator is formed by acoustically short-circuiting the inlet and outlet ducts of a flow reversal chamber. The agreement between experiments and simulations is excellent, justifying the use of the quasi-steady modeling approach.

Place, publisher, year, edition, pages
SAE International , 2011.
Keyword [en]
Acoustic systems, Flow reversals, Flow-acoustic interaction, Multi-port, Numerical studies, Outlet duct, Quasi-steady model, Quasi-steady modeling, Scattering matrices, T junctions, Acoustic fields, Mach number, Scattering parameters, Vehicles
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-148738DOI: 10.4271/2011-24-0218ScopusID: 2-s2.0-84877191241OAI: diva2:740499
10th International Conference on Engines and Vehicles, ICE 2011; Naples; Italy; 11 September 2011 through 15 September 2011

QC 20140825. QC 20160129

Available from: 2014-08-25 Created: 2014-08-11 Last updated: 2016-01-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Glav, Ragnar
By organisation
Marcus Wallenberg Laboratory MWLMWL Flow acoustics
In the same journal
SAE technical paper series
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 42 hits
ReferencesLink to record
Permanent link

Direct link