Comparison of the effects of different types of tube inserts on two-phase flow instabilities

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dc.authorid55579651700
dc.authorid55902360300
dc.authorid35090172900
dc.authorid55887326400
dc.contributor.authorOmeroglu G.
dc.contributor.authorÇomakl? O.
dc.contributor.authorKaragoz S.
dc.contributor.authorKarsli S.
dc.date.accessioned20.04.201910:49:12
dc.date.accessioned2019-04-20T21:44:22Z
dc.date.available20.04.201910:49:12
dc.date.available2019-04-20T21:44:22Z
dc.date.issued2013
dc.departmentBayburt Üniversitesien_US
dc.description.abstractTurbulence promoting inner elements such as rings, wings or winglets, twisted tapes, etc., is widely used in single- and two-phase flows. In this experimental work, the two-phase flow instabilities of forced convection boiling in a horizontal tube with ring- and twisted-tape-type inner elements inside are investigated. In order to analyze the two-phase flow of water, the experiments were conducted under a constant system pressure of 7.5 bar, and a constant heat input of 24 kW was applied to the outer surface of the circular test pipe with constant exit restriction. Three different inlet temperatures (Ti = 15, 25, and 35°C) were used to see the effect of inlet sub-cooling, and the mass flow rate was decreased from 110 to 20 g/s to obtain the characteristic curve. Two different pitch ratios for both the ring and twisted tape were evaluated in terms of stability. The results were evaluated in terms of appropriate variables for both the tube with insertions and the smooth tube. The analysis shows that the pressure drop increases with decreasing mass flow rate for all cases. The presence of the inner elements in the test pipe causes the boundaries of the oscillations to narrow in comparison with smooth tube. On the other hand, with the increase in the effective diameter of the test pipe the boundaries of the oscillations broaden. For each type of insertion, the increase of the pitch ratio makes the system less stable. © 2013 by Begell House, Inc.en_US
dc.identifier.doi10.1615/JEnhHeatTransf.2013007708
dc.identifier.endpage194
dc.identifier.issn1065-5131
dc.identifier.issue2
dc.identifier.scopus2-s2.0-84884875560en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage179
dc.identifier.urihttps://dx.doi.org/10.1615/JEnhHeatTransf.2013007708
dc.identifier.urihttps://hdl.handle.net/20.500.12403/839
dc.identifier.volume20
dc.identifier.wosWOS:000326989700006en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.relation.ispartofJournal of Enhanced Heat Transferen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectForced convection boiling
dc.subjectRough surface
dc.subjectSwirl-force device
dc.subjectTwisted-tape insert
dc.subjectTwo-phase flow
dc.subjectWire-coil insert
dc.subjectForced convection boiling
dc.subjectRough surfaces
dc.subjectSwirl-force device
dc.subjectTwisted-tape inserts
dc.subjectWire-coil insert
dc.subjectForced convection
dc.subjectTwo phase flow
dc.subjectTubes (components)
dc.subjectForced convection boiling
dc.subjectRough surface
dc.subjectSwirl-force device
dc.subjectTwisted-tape insert
dc.subjectTwo-phase flow
dc.subjectWire-coil insert
dc.subjectForced convection boiling
dc.subjectRough surfaces
dc.subjectSwirl-force device
dc.subjectTwisted-tape inserts
dc.subjectWire-coil insert
dc.subjectForced convection
dc.subjectTwo phase flow
dc.subjectTubes (components)
dc.titleComparison of the effects of different types of tube inserts on two-phase flow instabilitiesen_US
dc.typeArticleen_US

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