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Wave Propagation on Turbulent Jets

Thwaites, S.; Fletcher, Neville H.

Description

Results of experiments involving the propagation of acoustically generated waves on turbulent plane jets are presented. The jets are produced by a perspex reconstruction of an organ pipe flue and their behaviour is shown to conform to the predictions of similarity and self-preservation; i.e. the jet velocity V"' x-1/2 and the jet-width is proportional to x, where xis the distance from the slit. Thus they are fully turbulent and, as a consequence, well behaved and reproducible. The measured...[Show more]

dc.contributor.authorThwaites, S.
dc.contributor.authorFletcher, Neville H.
dc.date.accessioned2020-11-04T23:32:52Z
dc.date.available2020-11-04T23:32:52Z
dc.identifier.issn1610-1928
dc.identifier.urihttp://hdl.handle.net/1885/213631
dc.description.abstractResults of experiments involving the propagation of acoustically generated waves on turbulent plane jets are presented. The jets are produced by a perspex reconstruction of an organ pipe flue and their behaviour is shown to conform to the predictions of similarity and self-preservation; i.e. the jet velocity V"' x-1/2 and the jet-width is proportional to x, where xis the distance from the slit. Thus they are fully turbulent and, as a consequence, well behaved and reproducible. The measured wave velocities for frequencies between 200 Hz and 1200 Hz and slit-widths between 0.5 mm and 1.0 mm are compared with similar mea$urements on laminar jets. However, the stable nature of the turbulent jet allows much higher blowing pressures, up to 1500 Pa, to be used. The wave velocities u for the turbulent jet vary as x-1/2 and so the ratio of the ·wave velocity to the jet centre-velocity is constant along the jet. This ratio is closely equal to 0.5 except for small values of the effiux velocity and slit-width wh3re it rises to 0.6.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherEuropean Acoustics Association
dc.rights© 1980 European Acoustics Association
dc.sourceActa Acustica united with Acustica
dc.titleWave Propagation on Turbulent Jets
dc.typeJournal article
local.description.notesThe author was affiliated with University of New England when the paper was published
local.identifier.citationvolume45
dc.date.issued1980
local.publisher.urlhttps://acta-acustica.edpsciences.org/
local.type.statusPublished Version
local.contributor.affiliationFletcher, N. H., Department of Electronic Materials Engineering, The Australian National University
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage175
local.bibliographicCitation.lastpage179
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/23848..."The Published Version can be archived in any website" from SHERPA/RoMEO site (as at 5/11/2020).
CollectionsANU Research Publications

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