• Title of article

    AnexperimentalandanalyticalstudyoftheeffectofaxialpowerprofileonCHFOriginalResearchArticle

  • Author/Authors

    J.Yang، نويسنده , , D.C.Groeneveld، نويسنده , , L.K.H.Leung، نويسنده , , S.C.Cheng، نويسنده , , M.A.ElNakla، نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2006
  • Pages
    12
  • From page
    1384
  • To page
    1395
  • Abstract
    Theeffectofaxialheatfluxdistribution(AFD)onthecriticalheatflux(CHF)wasinvestigated.CHFmeasurementswereobtainedwithHFC-134acooledverticaltubeshavingfournon-uniformandoneuniformAFDprofiles.TheHFC-134atestconditionscoveredapressurerangefrom1.6to2.4MPa,amass-fluxrangefrom2.8to4.7Mgm−2s−1,andaninlet-qualityrangefrom−0.9to0.Thewater-equivalentpressureandmass-fluxrangesare10–14MPaand4–6.5Mgm−2s−1,respectively. Ingeneral,theobservedAFDeffectoncriticalpowerissmallathighinletsubcoolings.Atlowinletsubcoolings,thecriticalpowerfortheinlet-peakprofileisupto15%higherthanthatfortheoutlet-peakprofile.AlocalconditionsanalysisshowedthattheAFDhasthestrongesteffectonCHFathighdryoutqualities.CHFvaluesfornon-uniformAFDscouldbe50%lowerthanthosefortheuniformAFD.TheAFDeffectonCHFbecomesdiminishedwithdecreasingdryoutquality. FourdifferentapproachestoaccountfortheeffectofAFDonCHFwereassessedagainsttheexperimentalvaluesfromthecurrentexperiment.Theboiling-length-averageheat-fluxapproachwiththeboiling-lengthstartingpointattheonsetofannularflow(OAF)providedthebestpredictionofthecriticalpowerandtheCHFlocation.
  • Journal title
    Nuclear Engineering and Design Eslah
  • Serial Year
    2006
  • Journal title
    Nuclear Engineering and Design Eslah
  • Record number

    896089

    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=896089