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Article: Experimental simulation of a vertical round jet issuing into an unsteady cross-flow

TitleExperimental simulation of a vertical round jet issuing into an unsteady cross-flow
Authors
Issue Date2001
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/hy.html
Citation
Journal of Hydraulic Engineering, 2001, v. 127 n. 5, p. 369-379 How to Cite?
AbstractThis paper investigates the discharge of a vertical round jet into an unsteady cross-flow that consists of a mean flow and a sinusoidally oscillating component. An experimental technique is devised to simulate the unsteady cross-flow situation in the laboratory. A vertical jet-pipe-nozzle assembly is physically oscillated backward and forward in the steady flow stream of a laboratory flume, and the flow patterns are viewed by an observer moving with the jet. Dispersion patterns of the dye-marked jet fluid are studied with a phase-locked analysis of digitized flow images. Oscillations in cross-flow velocity are found to organize the jet fluid into regular large-scale fluid patches, which, after time averaging, lead to a widened jet width and enhanced dilution. Experiments are also carried out on a vertical jet discharging into a current with surface waves, a situation that approximates to a genuine oscillating cross-flow with a nonzero mean velocity. The two sets of experimental observations are found to match with each other. The validity of the experimental simulation technique is further supported by a computational fluid dynamics study of the flow problem, in which it is possible to produce an idealized oscillating cross-flow situation. The numerical results agree well with the experimental observations. © ASCE,.
Persistent Identifierhttp://hdl.handle.net/10722/150182
ISSN
2015 Impact Factor: 1.284
2015 SCImago Journal Rankings: 0.908
References

 

DC FieldValueLanguage
dc.contributor.authorLam, KMen_US
dc.contributor.authorXia, LPen_US
dc.date.accessioned2012-06-26T06:02:04Z-
dc.date.available2012-06-26T06:02:04Z-
dc.date.issued2001en_US
dc.identifier.citationJournal of Hydraulic Engineering, 2001, v. 127 n. 5, p. 369-379en_US
dc.identifier.issn0733-9429en_US
dc.identifier.urihttp://hdl.handle.net/10722/150182-
dc.description.abstractThis paper investigates the discharge of a vertical round jet into an unsteady cross-flow that consists of a mean flow and a sinusoidally oscillating component. An experimental technique is devised to simulate the unsteady cross-flow situation in the laboratory. A vertical jet-pipe-nozzle assembly is physically oscillated backward and forward in the steady flow stream of a laboratory flume, and the flow patterns are viewed by an observer moving with the jet. Dispersion patterns of the dye-marked jet fluid are studied with a phase-locked analysis of digitized flow images. Oscillations in cross-flow velocity are found to organize the jet fluid into regular large-scale fluid patches, which, after time averaging, lead to a widened jet width and enhanced dilution. Experiments are also carried out on a vertical jet discharging into a current with surface waves, a situation that approximates to a genuine oscillating cross-flow with a nonzero mean velocity. The two sets of experimental observations are found to match with each other. The validity of the experimental simulation technique is further supported by a computational fluid dynamics study of the flow problem, in which it is possible to produce an idealized oscillating cross-flow situation. The numerical results agree well with the experimental observations. © ASCE,.en_US
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/hy.htmlen_US
dc.relation.ispartofJournal of Hydraulic Engineeringen_US
dc.rightsJournal of Hydraulic Engineering. Copyright © American Society of Civil Engineers.-
dc.titleExperimental simulation of a vertical round jet issuing into an unsteady cross-flowen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9429&volume=127 &issue=5&spage=369 &epage= 379&date=2001&atitle=Experimental+simulation+of+a+vertical+round+jet+issuing+into+an+unsteady+crossflow-
dc.identifier.emailLam, KM: kmlam@hku.hken_US
dc.identifier.authorityLam, KM=rp00134en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0035336044en_US
dc.identifier.hkuros63909-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035336044&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume127en_US
dc.identifier.issue5en_US
dc.identifier.spage369en_US
dc.identifier.epage379en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLam, KM=7403656958en_US
dc.identifier.scopusauthoridXia, LP=7201955947en_US

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