Title of article
AnexperimentalinvestigationonthecriticalheatfluxenhancementbymechanicalvibrationinverticalroundtubeOriginalResearchArticle
Author/Authors
YongHoLee، نويسنده , , DaeHunKim، نويسنده , , SoonHeungChang، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
12
From page
47
To page
58
Abstract
Inordertogainanunderstandingoftherelationshipbetweencriticalheatflux(CHF)andflow-inducedvibration(FIV),anexperimentalinvestigationwascarriedoutwithverticalroundtubeattheatmosphere.Inthebothconditionofdeparturefromnucleateboiling(DNB)andtheliquidfilmdryout(LFD),CHFincreasesupto12.6%withvibrationintensity,representedbyvibrationalReynoldsnumber(Rev).CHFenhancementbytubevibrationseemstocomefromthereinforcedflowturbulentmixingandtheincrementofdepositionofdropletintotheliquidfilm.Basedontheexperimentalresults,anempiricalcorrelationisproposedforthepredictionofCHFenhancementratio.ThecorrelationpredictstheCHFenhancementratio(En)withreasonableaccuracy,withanaverageerrorrateof4.5and26.5%forRMS.VibrationisaneffectivemethodforheattransferenhancementaswellasCHF.Nonetheless,theriskofsystemfailurebyFIVhasmadeitverydifficulttotakeadvantageofvibrationinheattransferfacilities.Therefore,itisnecessarytofindoutoptimalfueldesignenhancingtheCHFbutpreventingFIVdamageinanacceptablevibrationrange.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2004
Journal title
Nuclear Engineering and Design Eslah
Record number
894698
Link To Document