Title of article :
Analysisofthecapabilityofsystemcodestomodelcavitationwaterhammers:SimulationofUMSICHTwaterhammerexperimentswithTRACEandRELAP5OriginalResearchArticle
Author/Authors :
WernerBarten، نويسنده , , AudriusJasiulevicius، نويسنده , , AnnalisaManera، نويسنده , , RafaelMacian-Juan، نويسنده , , OmarZerkak، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
ThecapabilitiesofthenuclearsystemtransientcodesTRACEandRELAP5tomodelcoupledtwo-phaseflowandpressurewavepropagationsinapipeareassessedbyanalyzingtheUMSICHTPPPcavitationwaterhammerexperiments329and135aftervalveclosure.Time-dependentpressure,flowbehaviour,andthegenerationandcollapseofvaporbubblesatthevalveandthefirstbridgearediscussed.Weshowthatbothcodesareabletomodeltheflowbehaviourofthewaterhammerforthehighpressureandhightemperaturecase329(initially10–13barand420K),howevercondensationheattransferforthebasecaseneededtobeincreasedinordertoaccuratelymodelthemagnitudeofthefirstpressureexcursion.TheexperimentalbroadeninganddampingofthesubsequentpressurepeaksbyFluid-StructureInteraction(FSI)phenomenaarisingfromtheinteractionoftheflowwiththevibrationsofthepipingstructurearenotconsideredinthemodelingresults.Forthelowerpressureandtemperaturecase135(initially1–4barand294K),theTRACEcodeprovidesagoodapproximationofthepropagationofthepressurewaveandthevoidfractionbehaviour,alreadywithbasecaseconditions,whileRELAP5overpredictsthevaporgenerationalongthepipeand,asaresult,considerablyunderpredictsthepressureamplitudesandoverpredictsthewaterhammerfrequency.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
