Title of article
Heattransferintwo-componentinternalmistcooling:PartI.ExperimentalinvestigationOriginalResearchArticle
Author/Authors
V.Novak، نويسنده , , D.L.Sadowski، نويسنده , , K.G.Schoonover، نويسنده , , S.I.Abdel-Khalik، نويسنده , , S.M.Ghiaasiaan، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
10
From page
2341
To page
2350
Abstract
Anexperimentalinvestigationwasconductedtoexaminesteady,internal,nozzle-generated,gas/liquidmistcoolinginverticalchannels.Theidealprimarycoolingmechanisminthissituationissurfaceevaporationofanultra-thin,subcooledliquidfilmthatformsontheheatedsurface.Theaimwastoquantifytheeffectsofvariousoperatinganddesignparametersonthecoolingeffectiveness.Parameterstestedincludedtheliquidatomizationnozzledesign,inletflowcondition(liquidmassfraction;carriergasvelocity,temperatureandhumidity;liquidtemperature;liquiddropletsizedistribution;andgas/liquidcombination),channelcharacteristics(cross-sectiongeometry,lengthandsurfacewettability),andflowdirection.Interestinthisresearchhasbeenmotivatedbytheneedforahighlyefficientcoolingmechanisminhigh-powerlasersforinertialfusionreactorapplications.Afullyinstrumentedexperimentaltestfacilitythatincludedthreecylindricalandtworectangularelectricallyheatedtestsectionswithdifferentcross-sectionsandunheatedentrylengthswasused.Thechannelhydraulicdiameterscoveredtherange16–26.7mm,andtheheatedlength-to-hydraulic-diameterratiovariedintherangefrom23.3to51.Waterwasusedasthemistliquid,withairorheliumasthecarriergas.Threetypesofmistgeneratingnozzleswithsignificantlydifferentspraycharacteristicswereused.Localheattransfercoefficients,definedbasedonthetemperaturedifferencebetweentheheatedsurfaceandthebulkgas,wereobtainedalongthechannelsforawiderangeofoperatingconditions.Thedataindicatethatmistcoolingcanincreasetheheattransfercoefficientbymorethananorderofmagnitudecomparedtoforcedconvectionusingonlythecarriergas.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895190
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