Title of article
PressuredropsforsteamandwaterflowinheatedtubesOriginalResearchArticle
Author/Authors
L.K.H.Leung، نويسنده , , D.C.Groeneveld، نويسنده , , A.Teyssedou، نويسنده , , F.Aubé، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
13
From page
53
To page
65
Abstract
Measurementsofpressuredropforasteamandwaterflowinsideseveralheatedtubeswereobtainedattwodifferentlaboratories(ChalkRiverLaboratoriesandÉcolePolytechnique).ThetestsectionsusedtocarryouttheexperimentswereconstructedwithInconel-600tubes,andwerecooledinternallywithanupwardflowofwater.Areductioninfrictionalpressuregradientwithanincreaseinheatfluxwasobservedforsingle-phaseflowsatthesamecross-sectional-averageconditions.Afterboilingwasinitiated,thetwo-phasefrictionmultiplierincreasedwithincreasingheatfluxinthebubbly-flowregion,butdecreasedintheannular-flowregion.Astheheatedsurfaceapproacheddryout,thetwo-phasefrictionmultiplierexhibitedamaximumvalueanddecreasedwithincreasingthermodynamicquality,untildryoutoccurred.Thedecreasingtrendwasattributedtoareductionintheliquid-filmthicknessandtheterminationofliquidentrainment.Followingtheoccurrenceofcriticalheatflux,asignificantdropinfrictionalpressuregradientwasnoted,causedbythechangeinthenear-wallsublayertoalow-viscosityvaporblanket.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
894837
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