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:10050329(2008)06002505CFD1,1,2,2,1(1.,430074;2.,410007):CFDFLUENT,,k-,N-S,,,,FLUENT,,:;;CFD;FLUENT:TB42:ANumericalSimulationofCompressibleFlowinStraightThroughlabyrinthSealbyCFDDINGXue2jun1,YANGYan2lei1,HUANGLai2;HUANGPi2wei2;LIUShun1(1.HuazhongUniversityofScienceandTechnology,Wuhan430074,China;2.HunanElectricPowerTesting&ResearchInstitute,Changsha410007,China)Abstract:Fluent,whichisoneofthemostpopularsoftwareinComputationalFluidDynamics,isusedasthemaintoolofnu2mericalsimulation,thefinitevolumemethod(FVM)isusedinFluent.Theturbulentmodelis2equation,andWhensolvingN2Sequation,segregatedmethodandcoupledmethodareusedtogether.AftercalculatingbyFLUENT,theflowfieldinlabyrinthsealisobtainedandcomparedtotheresultofexperiment,whichshowsagoodaccordance.Byanalyzingthecurvesoffluxcoeffi2cienttolabyrinthseal’sgeometricparameter,anewdesignisputinandoptimized.Keywords:labyrinthseal;numericalsimulation;CFD;FLUENT1,,,,,,,,,,,,,,CFD,,,,,22.1(1):P=RT(1)(2)N-S::20071204522008360655t+¨(v)=0dvdt=f-1¨p+1div55t[(v22+e)]+¨[v(v22+e)]=fv-¨(v)++vdiv+qk+¨(k¨T)(2)(3),k-:D(k)Dt=55xj[(+tk)5k5xj]+Gk+Gb--YMD()Dt=55xj[(+t)55xj]-C22k+C1k(Gk+C3Gb)(3)ktGkt,t=CK2/C1=1.44;C2=1.92;C=0.09;k=1.0;=1.32.2,;,311[1],L=B=3.21mm,C=0.2mm,R=75mm,t=0.2mm;1.01325105Pa:Ma=0.65,R=287.06Nm/(kgK),CP=1004.0Nm/(kgK),T=300K,L=1.810-5Ns/m2[1],,,Childs[2],2,,2:P0/P2=1.2Childs[2],Childs:mi=1i2iHi(Pi-12-Pi2RT)1/2(4)1i=/(+2-5Si+2Si2)Si=(Pi-1/Pi)r-1/r-12i=1(1-i)1/2i=8.52/[(Li-TpiCri)+7.23]1iSiTpi:=/,[3]:ml=A2(0P0)1/2(2kk-1)1/2[(P2P0)2/k-(P2P0)(k+1)/k]1/2(5)0P0A2P2k1.2,101325Pa,FLUENT=62FLUIDMACHINERYVol136,No106,20080.596,Childs=0.588,0.014,:3,,,,,,,,3(Pa)4,,,,,4,Ct565C6t56,C,t,t0.2mm,,,t=0.4mm,L7L,L,7LCt,,,C,t,L,,,,,45,AB(8),AB,,172200836068110.5872A0.5693A0.5814B0.6245B0.5856AB0.5577AA0.558,,7,49[4],t/C=1,n=3,H=3.0mm,B=3.5mm,t=0.3mm,=16,,P3,P0P0/P31.13.0,P0/P310119,,,,[4],2.01214,,,,,1011122.0(Pa)132.082FLUIDMACHINERYVol136,No106,2008142.0(kg/m3)5(1),Childs,,[4],,CFD(2)CFD,,,(3),,,,[1].[J].,1992,9(3):87292.[2]ChildsDW,ScharrerJK.TheoryVersusExperimentfortheRotordynamicCoefficientsofLabyrinthGasSeals:Part12ATwoControlVolumeModel[J].JournalofTribology,TransactionsoftheASME,1998,110(7):2702280.[3].()[M]..,1980.[4]..[J].1997,18(3):79281.:(19622),,,,:430074(56),,,5.2,,,,,,,6,,,,,[1]PUMPHANDBOOKIgorJ.KarassikJosephP.MessinaPaulCooperCharlesC.Head2001(Thirdedition)[Z].[2].[M].:,2003.[3].[M].:,2005.[4]APISTANDARD685SeallessCentrifugalPumpsforPetroleum,HeavyDutyChemical,andGasIndustryServicesOctober2000(Firstedition)[Z].:(1974-),,,:2011088791()9220083606