Effect of exit Reynolds number on self-preservation of a plane jet

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dc.contributor.authorMi, J.
dc.contributor.authorFeng, B.
dc.contributor.authorDeo, R.
dc.contributor.authorNathan, G.
dc.date.issued2009
dc.description.abstractWe investigated in experiment the effect of exit Reynolds number on self-preservation of a turbulent plane jet. Centerline velocity statistics were measured in plane jets issuing from the same nozzle but, respectively, with seven Reynolds numbers varying between Re=4,582 and Re=57,735, where Re≡Ujh/ν (Uj being the momentum-averaged exit mean velocity, h the slot height and ν the kinematic viscosity). All measurements were conducted using single hot-wire anemometry and over an axial distance (x) of 40 h. These measurements revealed a significant Re-dependence of either the mean or turbulent flow field. As Re increases, the pace of the jet development decreases and, as a result, both the mean and turbulent properties reach their self-preserving states over a longer downstream distance (x). The centerline integral scale L for all jets grows linearly with x and the growth rate decreases as Re is increased. It is also found that the local Reynolds number ReL scales with x as ReL∝x1/2. The study suggests that differences of the self-preserving states observed may be related to the differences in the underlying turbulence structures in the near field of the seven jets.
dc.description.statementofresponsibilityMi, Jianchun; Feng, Bao-Ping; Deo, Ravinesh C. and Nathan, Graham J.
dc.identifier.citationActa Physica Sinica, 2009; 58(11):7756-7764
dc.identifier.doi10.7498/aps.58.7756
dc.identifier.issn1000-3290
dc.identifier.issn1000-3290
dc.identifier.orcidNathan, G. [0000-0002-6922-848X]
dc.identifier.urihttp://hdl.handle.net/2440/59462
dc.language.isoen
dc.publisherChinese Physical Soc
dc.rightsCopyright 2009 Chinese Physical Society
dc.source.urihttp://eprints.usq.edu.au/7438/
dc.subjectplane jet
dc.subjectReynolds number
dc.subjectself-preservation
dc.titleEffect of exit Reynolds number on self-preservation of a plane jet
dc.typeJournal article
pubs.publication-statusPublished

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