Title of article :
Experimentalstudyonconvectiveheattransferofwaterflowinaheatedtubeundernaturalcirculation
Author/Authors :
RuichangYang، نويسنده , , RuoleiLiu، نويسنده , , YongZhong، نويسنده , , TaoLiu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
Thispaperreportsonanexperimentalstudyontransitionalheattransferofwaterflowinaheatedverticaltubeundernaturalcirculationconditions.Intheexperimentsthelocalandaverageheattransfercoefficientswereobtained.Theexperimentaldatawerecomparedwiththepredictionsbyaforcedflowcorrelationavailableintheliterature.ThecomparisonsshowthattheNusseltnumbervalueinthefullydevelopedregionisabout30%lowerthanthepredictionsbytheforcedflowcorrelationduetoflowlaminarizationinthelayerinducedbyco-currentbulknaturalcirculationandfreeconvection.ByusingtheRayleighnumberRatorepresenttheinfluenceoffreeconvectiononheattransfer,theempiricalcorrelationsforthecalculationoflocalandaverageheattransferbehaviorinthetubeatnaturalcirculationhavebeendeveloped.Theempiricalcorrelationsareingoodagreementwiththeexperimentaldata.Basedontheexperimentalresults,theeffectofthethermalentry-lengthbehavioronheattransferdesigninthetubeundernaturalcirculationwasevaluated.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
