Title of article
TheoreticalcalculationofannularupwardflowinanarrowannuliwithbilateralheatingOriginalResearchArticle
Author/Authors
GuanghuiSu، نويسنده , , JunliGou، نويسنده , , SuizhengQiu، نويسنده , , XiaoqiangYang، نويسنده , , DounanJia، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
29
From page
219
To page
247
Abstract
Basedonseparatedflow,atheoreticalthree-fluidsmodelpredictingforannularupwardflowinaverticalnarrowannuliwithbilateralheatinghasbeendevelopedinpresentpaper.Thetheoreticalmodelisbasedonfundamentalconservationprinciples:themass,momentum,andenergyconservationequationsofliquidfilmsandthemomentumconservationequationofvaporcore.Throughnumericallysolvingtheequations,liquidfilmthickness,radialvelocity,andtemperaturedistributioninliquidfilms,heattransfercoefficientofinnerandoutertubesandaxialpressuregradientareobtained.Thepredictedresultsarecomparedwiththeexperimentaldataandgoodagreementsbetweenthemarefound.Withsamemassflowrateandheatflux,thethicknessofliquidfilmintheannularnarrowchannelwilldecreasewithdecreasingtheannulargap.Thetwo-phaseheattransfercoefficientwillincreasewiththeincreaseofheatfluxandthedecreaseoftheannulargap.Thatis,theheattransferwillbeenhancedwithsmallannulargap.Theeffectsofouterwallheatfluxonvelocityandtemperatureintheouterliquidlayer,thicknessofouterliquidfilmandouterwallheattransfercoefficientareclearandobvious.Theeffectsofouterwallheatfluxonvelocityandtemperatureintheinnerliquidlayer,thicknessofinnerliquidfilmandtheinnerwallheattransfercoefficientareverysmall;thesimilareffectsoftheinnerwallheatfluxarefound.Astheapplicationsofthepresentmodel,thecriticalheatfluxandcriticalqualityarecalculated.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2003
Journal title
Nuclear Engineering and Design Eslah
Record number
894607
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