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1、936IEEETRANSACTIONSONPLASMASCIENCE,VOL.40,NO.3,MARCH2012TurbulenceandMagneticFieldCalculationsinHigh-VoltageCircuitBreakersJean-JacquesGonzalez,PierreFreton,FrankReichert,andDannetRandrianarivaoAbstractInhigh-voltagecircuitbreakers(HVCBs),therep-“heatingvolume”
2、whichgeneratesareverseflowthatblowsoutresentationofconvectionisessentialtoprovideasatisfactorythearcataroundcurrentzero.Dependingontheblowgaspres-descriptionofthepressureincreaseintheheatingvolumeorsure,blowgasconditions,andthetransientrecoveryvoltagethermalexpa
3、nsionchamber.Theplasmaflowismainlygovernedthatbecomesestablishedbetweenthecontacts,thearccanbebyLorentzforcesandturbulenceeffects.TheLorentzforcesdependontheself-inducedmagneticfieldwhichcanbecalculatedinterruptedorcanreignitebeforeitiscompletelyinterrupted.bysev
4、eralapproaches.AmixingformulationbasedonresolvingTomakeoptimumuseoftheself-blastmechanism,thearcthepotentialvectorsandaBiotSavartintegralfortheboundarybehaviormustbefullyunderstoodatallcurrentphases:theconditionisapplied.Thedifferencebetweenthisformulationhigh-
5、currentphase(ablationarc),thephaseshortlybeforeandanullfluxboundaryconditionisillustrated.Themixingcurrentzero(axialblownarc),thephasearoundcurrentzeroformulationgivessimilarresultstotheuseofBiotSavartovertheentiredomainbutismuchlesstimeconsuming.Torepresent(the
6、rmalinterruption),andalsotherecoveryphaseofthegasturbulence,oneofthemostfrequentlyusedmodelsisthePrandtlgapaftercurrentzero(earlyandlatedielectrics).Inadditiontomixinglengthmodel(PMLM).Nevertheless,recentworkshaveafullunderstanding,theabilitytoreliablysimulatea
7、llarcingdemonstratedthattherealizablemodel(RM)mustrepresentthephasesprovidesfullspatiotemporalinformationonthepressureflowbehaviorintheheatingvolume.Suchamodelwasappliedandandtemperaturedistributionsintheentirebreaker.comparedtothePMLMovertheentireHVCBdomain.The
8、RMisclearlysuitabletodescribetheturbulenceinHVCBgeometry.Arcbehaviorisalwayscharacterizedbyasetofdifferentheatingandcoolingmechanisms.ThegasisheatedbytheIndexTermsHigh-volta
