Title of article
Comparisonofthermo-hydraulicperformancesoflargescalevortexflow(LSVF)andsmallscalevortexflow(SSVF)mixingvanesin17×17nuclearrodbundleOriginalResearchArticle
Author/Authors
C.M.Lee، نويسنده , , Y.D.Choi، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2007
Pages
10
From page
2322
To page
2331
Abstract
Spacergridsinthenuclearfuelrodassemblymaintainaconstantdistancebetweenrods,secureflowpassageandpreventthedamageoftherodbundlefromflow-inducedvibration.Themixingvanesattachedtothespacergridsgeneratevortexflowsinthesubchannelsandenhancetheheattransferperformanceoftherodbundle.Varioustypesofmixingvaneshavebeendevelopedtoproducecrossflowsbetweensubchannelsaswellasvortexflowsinthesubchannels.
Theshapesofthemixingvanehavebeenimprovedtogeneratelargerturbulenceandcrossflowmixing.Inthepresentstudy,twotypesoflargescalevortexflow(LSVF)mixingvanesandtwotypesofsmallscalevortexflow(SSVF)mixingvanesareexamined.SSVF-singleisconventionalsplittypeandSSVF-coupleissplittypewithdifferentarrayingmethod.LSVFmixingvanehasdifferentgeometryandarrayingmethodtomakelargescalevortex.17×17rodbundlewitheightspansofmixingvanesissimulatedusingtheIBM690supercomputer.TheFLUENTcodeandIBMsupercomputerisemployedtocalculatetheflowfieldandheattransferinthesubchannels.
Turbulenceintensities,maximumsurfacetemperaturesoftherodbundle,heattransfercoefficientsandpressuredropsofthefourkindsofmixingvanesarecompared.LSVFmixingvanesproducedhigherturbulenceintensityandheattransfercoefficientthanSSVFmixingvanes.Consequently,LSVFmixingvaneincreasesthethermalefficiencyandsafetyoftherodbundle.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2007
Journal title
Nuclear Engineering and Design Eslah
Record number
894970
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