汽轮机中压缸迷宫式汽封完整级气动性能的分析

29820098JournalofPowerEngineeringVol.29No.8Aug.2009:2009204202:2009205206:(19832),,,,,.(Tel.):13761569765;E2mail:[e-mail].:100026761(2009)0820743204:TK229.2:A:470.30,,(,200241):,,,,,.:.,.:;;;AerodynamicPerformanceAnalysisofTurbineStagewithLabyrinthGlandinIntermediatePressureCylinderofSteamTurbineYANGRui,YANGJian2dao,PENGZe2ying(Turbo2machineryFlowandBladeTechnologyInstitute,ShanghaiElectricPowerGenerationTechnologyResearchDevelopmentCenter,Shanghai200241)Abstract:Theaerodynamicperformanceoflabyrinthglandwasanalyzedthroughthenumericalsimulationofintermediatepressure(IP)flowstagewithlabyrinthgland.Bycomparisonoftheflowingstatusfortheturbinestagewithandwithoutthegland,itisfoundthatthesealleakagehascertaininfluenceontheaerodynamicperformanceoftheblades,especiallyattherotorbladerootandstatorbladetipwithevidenteffects.Itispointedoutthat,theglandhasevidenteffectsontheflowingefficiency.Itissuggestedthatthetypeoftheglandbereformedtoenhancetheunitsefficiency.Keywords:steamturbine;labyrinthgland;aerodynamicperformance;numericalsimulation,[1].,...,[2].,1,,,[3].,,,.,,CFD[1].,.Numeca783,:1,.1,CFD[1].,,,,;,,CFD,,.(1),3s7r7s8.,4Runge2Kutta,S2A,CFL1.5.:5U_5t+F_I+F_V=Q(1):U_;F_IF_V;Q.F_I=fI1i_x+fI2i_y+fI3i_z(2)FV=fV1i_x+fV2i_y+fV3i_z(3)U=€€“w1€“w2€“w3€ŽE(4)fIi=€“w1Šp31i+€“wi“w1Šp32i+€“wi“w2Šp33i+€“wi“w3(€ŽE+Šp3)“wi-fVi=0i1i2i3qi+“wjij(5)Q,,,:Q=00-€[2_w_+_(_r_)]w__(0.52r2)0(6)1Fig.1Bladesandlabyrinthglandstructure22.1,,,.,1,(1).1Tab.1Aerodynamicperformanceparameters/MPa/%/(kgs-1)/(kgs-1)s7r7s81.13890.6388.27255.91256.560.821.140.821.16090.7188.35250.69251.400.801.120.811.18090.7488.42245.88246.530.781.090.801,,(7):3u=h3uh3s=h3in-h3outh3in-h3outss(7).,2.4%,25%.,h[4]:h=h3s=Gh+GtG3uh3s(8):Gh;Gt;G;.=Gh+GtG3u=0.01090.09063=0.0099(9),3u=0.9063-0.0099=0.8964..,,CFD44729.2.22.2:2,,,.,,,,,,[5].(a)(b)2Fig.2Staticpressuredistributioninlabyrinthgland34.:,,,.1,[6],2,,,,,..,[7].(a)(b)3Fig.3Flowfieldofthediaphragmgland4Fig.4Flowfieldoftheshroudbandgland2.3,,.5r7s85478,::r7,,,,;s8,,,.,.s8(6):s8,,,5r7,s8Fig.5Totalpressurerecoverycoefficientalongspanwiseforr7&s8(a)(b)6s8Fig.6Limitingstreamlineonsurfaceofs8,.3(1),,.,,2,.(2):,.(3),,.,,,.(4),.,,,.:[1]THIEMANNT,LAZZERADE.CFD[J].,2003,32(2):86294.[2]CHUPPRE,HENDRICKSRC,LATTIMESB.SealinginTurbomachinery[J].JournalofPropulsionandPower,2006,22(2):3132346.[3],,,.[J].,2000,21(6):6942696.[4].[M].:,1988.[5],,.[J].,2009,38(1):15224.[6],.[J].,2007,27(4):4732476.[7],,,.[J].,2006,42(5):1652168.64729