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Article: Multiple tandem jets in cross-flow

TitleMultiple tandem jets in cross-flow
Authors
KeywordsEnvironmental hydraulics
Jet in crossflow
Jets
Mixing and transport
Multiport diffuser
Plumes
Turbulent flows
Water quality
Issue Date2006
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, 2006, v. 132 n. 9, p. 971-982 How to Cite?
AbstractThe interaction of multiple tandem jets in a cross-flow has been studied through experiments. Experiments are conducted with 2-8 momentum and buoyant jets discharged into a perpendicular cross-flow. The tracer concentration field is measured by the laser-induced fluorescence technique. The effective cross-flow velocity in between adjacent jets is inferred from the measured trajectory and prediction by a validated Lagrangian model. Particle image velocimetry is also applied to measure the velocity distribution directly. It is found that the effective cross-flow affecting the behavior of the downstream jets is significantly reduced due to the sheltering effect as well as the entrainment demand in the momentum-dominated near field of the leading edge jet. The trajectories of all the jets downstream of the leading jet are found to be similar. The reduction of effective cross-flow velocity for the downstream jets becomes larger as the jet spacing decreases but is found to be independent of the sequential order of jet position or the number of jets in the group. The reduced effective ambient velocity ratio is typically in the range of 0.3-0.7 for jet to ambient velocity ratio of K=4-15, and jet spacing to diameter ratio of s/D=2-15, with an overall mean value of 0.56. Based on the present results, a first-order analysis is presented to predict the trajectory of the multiple tandem jets; the predictions are in good agreement with data of this and previous investigations. © 2006 ASCE.
Persistent Identifierhttp://hdl.handle.net/10722/70776
ISSN
2015 Impact Factor: 1.284
2015 SCImago Journal Rankings: 0.908
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDaeyoung, Yen_HK
dc.contributor.authorAli, MSen_HK
dc.contributor.authorLee, JHWen_HK
dc.date.accessioned2010-09-06T06:26:01Z-
dc.date.available2010-09-06T06:26:01Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Hydraulic Engineering, 2006, v. 132 n. 9, p. 971-982en_HK
dc.identifier.issn0733-9429en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70776-
dc.description.abstractThe interaction of multiple tandem jets in a cross-flow has been studied through experiments. Experiments are conducted with 2-8 momentum and buoyant jets discharged into a perpendicular cross-flow. The tracer concentration field is measured by the laser-induced fluorescence technique. The effective cross-flow velocity in between adjacent jets is inferred from the measured trajectory and prediction by a validated Lagrangian model. Particle image velocimetry is also applied to measure the velocity distribution directly. It is found that the effective cross-flow affecting the behavior of the downstream jets is significantly reduced due to the sheltering effect as well as the entrainment demand in the momentum-dominated near field of the leading edge jet. The trajectories of all the jets downstream of the leading jet are found to be similar. The reduction of effective cross-flow velocity for the downstream jets becomes larger as the jet spacing decreases but is found to be independent of the sequential order of jet position or the number of jets in the group. The reduced effective ambient velocity ratio is typically in the range of 0.3-0.7 for jet to ambient velocity ratio of K=4-15, and jet spacing to diameter ratio of s/D=2-15, with an overall mean value of 0.56. Based on the present results, a first-order analysis is presented to predict the trajectory of the multiple tandem jets; the predictions are in good agreement with data of this and previous investigations. © 2006 ASCE.en_HK
dc.languageengen_HK
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/hy.htmlen_HK
dc.relation.ispartofJournal of Hydraulic Engineeringen_HK
dc.rightsJournal of Hydraulic Engineering. Copyright © American Society of Civil Engineers.en_HK
dc.subjectEnvironmental hydraulicsen_HK
dc.subjectJet in crossflowen_HK
dc.subjectJetsen_HK
dc.subjectMixing and transporten_HK
dc.subjectMultiport diffuseren_HK
dc.subjectPlumesen_HK
dc.subjectTurbulent flowsen_HK
dc.subjectWater qualityen_HK
dc.titleMultiple tandem jets in cross-flowen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9429&volume=132&issue=9&spage=971&epage=982&date=2006&atitle=Multiple+tandem+jets+in+crossflowen_HK
dc.identifier.emailLee, JHW: hreclhw@hku.hken_HK
dc.identifier.authorityLee, JHW=rp00061en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)0733-9429(2006)132:9(971)en_HK
dc.identifier.scopuseid_2-s2.0-33747343120en_HK
dc.identifier.hkuros125904en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33747343120&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume132en_HK
dc.identifier.issue9en_HK
dc.identifier.spage971en_HK
dc.identifier.epage982en_HK
dc.identifier.isiWOS:000239801000010-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridDaeyoung, Y=14068604200en_HK
dc.identifier.scopusauthoridAli, MS=7404486066en_HK
dc.identifier.scopusauthoridLee, JHW=36078318900en_HK

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