Quasisteady model of the acoustic scattering of a T- Junction
2011 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 330, no 21, 5131-5137 p.Article in journal (Refereed) Published
T-junctions are common elements in flow duct networks. It is shown that for low Strouhal numbers, based on the duct diameter, their acoustic scattering properties can be described using an incompressible quasi-steady model. Models are derived for systems subjected to combinations of grazing and bias mean flow, and are shown to work in both the limiting cases that is, grazing or bias flow alone as well as for the joining or dividing flow configurations. The upper Strouhal number for which the quasi-steady models are applicable is limited by flow-acoustic interaction effects, which differ significantly between the different flow configurations. Generally the models are applicable up to Strouhal numbers of approximately 0.1-0.2, which is comparable with previous published models for other configurations such as bends and orifices. This range is sufficient to make the model useful in many important engineering applications.
Place, publisher, year, edition, pages
2011. Vol. 330, no 21, 5131-5137 p.
aeroacoustic response, duct
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-29567DOI: 10.1016/j.jsv.2011.05.012ISI: 000293725500012ScopusID: 2-s2.0-79960555852OAI: oai:DiVA.org:kth-29567DiVA: diva2:395924
FunderTrenOp, Transport Research Environment with Novel Perspectives
QC 20110208. Updated from submitted to published 201203272011-02-082011-02-082012-06-12Bibliographically approved