圆筒炉内燃烧器出口湍流流动和燃油燃烧的三维数值模拟

:20050907::10018719(2006)04004907THREEDIMENSIONALNUMERICALSIMULATIONOFTURBULENTFLOWANDCOMBUSTIONINTHEOUTLETOFOILBURNER周桂娟,毛羽,王娟ZHOUGuijuan,MAOYu,WANGJuan(,102249)(StateKeyLaboratoryofHeavyOilProcessing,ChinaUniversityofPetroleum,Beijing102249,China):,,,k,,EBUArrhenius,,:;;;;:TE963:AAbstract:Thenumericalsimulationofturbulentflowandoilcombustioninaspotoilgasburnerwascarriedout.Structuredgridwasmadewithnosimplificationandmodificationofthecomplicatedstructureinthehearthandburner.Thecomprehensivemathematicalmodelforsimulatingspraycombustionwasdevelopedonthebasisofpreviousworkofotherpeople.Theturbulentflowofgasphasewasmodeledbykturbulentmodel.Particledispersionintheturbulentflowwasmodeledbyastochasticmethod.Forgasphasecombustionaswellasradiationheattransfer,theEBUArrheniusmodelandthediscreteordinatesmodelwereused.Thedetailedinformationaboutflowfield,temperaturefield,concentrationdistributionandflamesizeintheoutletofburnerwassuccessfullyobtained,presentingthebasiccharacteristicsofflow,spraycombustionandheattransferprocess.Thesesimulationresultsareingoodagreementwithspotmeasuringdata.Keywords:spraycombustion;burner;mathematicalmodel;structuredgrid;numericalsimulation,,,,,()20068ACTAPETROLEISINICA(PETROLEUMPROCESSINGSECTION)224,[1-3],,,,NOx,CFD(Computationalfluiddynamics),,,,,,1,,,,:(1);(2);(3);(4),1.1k,,[4]:t()+xj(uj)=xj(!xj)+S+Sp(1),,(x):dupdt=FD(u-up)+gx(p-)p+Fx(2)1.2EBUArrhenius[5],Arrhenius:Wfuel,Arr=B2YfuelYO2exp-ERT(3)Wfuel,EBU=CEBUkmin[Yfuel,YO2,Ypro](4)Wfuel=min[Wfuel,Arr,Wfuel,EBU](5)1.3,,,[6],:m=∀dpNup#gCpgln1+Cpg(T-Tp)qe(6)1.4,[7-8],4∀,,,50()22:dI(l,s)ds=-(ka+ks)I(l,s)+kan2∃T4∀+ks4∀!4∀0I(l,s∀)%(s,s∀)d&∀(7)Q=ka#s∋sI(l,s)-4∃T4(8)(7)s,1,2,3s(8)2,1,;,;,,,,3m,9m,45∃2m,,,21Fig.1Schematicoftheoilgasburner2Fig.2MeshoftheoilgasburnerMastersizer1998(MALVERN),SauterMeanDiameter(SMD)50(mn2.3,(%)(&),11%&Table1Operatingmodesof%and&OperatingmodeExcessairMassflowrate1)/kg∋h-1Temperature1)/KVelocity/m∋s-1PrimaryairSecondaryairTemperature/KPrimaryairSecondaryair%1.2212.82963.61.5298298&1.2212.83913.61.52982981)Heavyfueloil51433,,,,,,,,,,,,,,,44,,,,,,,3Fig.3Radialdistributionofaxialvelocity(a)Nocombustion;(b)Combustionx/D:(1)0.15;(2)0.82;(3)1.49;(4)2.16;(5)2.83,;,,,,,,4Fig.4Axialvelocitydistributionalongcenterlineofthefurnace(1)Combustion;(2)Nocombustion5(a),5(b)5,,4.85m0.52m,4.94m0.58m,,66,,;,,,1000K,,,,,52()22,;,,,,,,,5Fig.5Comparisonofsimulationflameandspotflameinthefurnace(a)Simulationflame;(b)Spotflameinthefurnace6Fig.6RadialdistributionofthetemperatureattheaxialofthefurnaceSamelegendsasinFig.377,,,,,0;,,4.8m,8CO28(a),,,,,,7Fig.7RadialdistributionofthemolarfractionsofoilvapourSamelegendsasinFig.3,,,,,,,8(b),O2,,CO2,,CO24(1),,,,534(2),,(3),,,,,(4),O2CO2,,,(5),NOx,,8O2CO2Fig.8RadialdistributionofO2andCO2molarfractionsinthefurnace(a)O2;(b)CO2SamelegendsasinFig.3:B(((,1/s;CEBU(((,0.4;Cpg(((,J/(kg∋K);D(((,m;d(((,m;dp(((,m;E(((,J/mol;FD(((;Fx(((,N;gx(((x;I(((,W/(m2∋Sr);k(((,m2/s2;ka(((,1/m;ks(((,1/m;l(((;m(((,kg/s;Nup(((Nusselt;n(((;Q(((,J/kg;qe(((,J/kg;R(((;Rf(((,m;r(((,m;S(((;s(((;s(((;s∀(((;t(((,s;T(((,K;u(((,m/s;W(((,kg/s;x(((,m;Y(((,%;y(((;)(((;(((,m2/s3;#g(((,W/(m∋K);(((,kg/m3;∃(((StefanBoltzmann;(((;54()22!(((;%(((;&∀(((;∋s(((;:Arr(((;EBU(((;fuel(((;pro(((;p(((;j(((1,2,3;(((:[1]SaarioA,RebolaA,CoelhoPJ,etal.Heavyfueloilcombustionincylindricallaboratoryfurnacemeasurementsandmodeling[J].Fuel,2005,84(4):359-369.[2]RafaelV,RogelioE.Ahighlyradiativecombustionchamberforheavyfueloilcombustion[J].InternationalJournalofHeatandMassTransfer,1998,41(20):3087-3097.[3]ColsonG,PeetersF,RuyckJDe.Experimentinflamestudyofa15MWdualfuelgas/oilburner[J].Fuel,1999,78(20):1253-1261.[4].[M].:,1994.[5],.[M].:,1991.[6],,,.[M].:,1992.[7]FivelandWA.Discreteordinatesolutionsofradiativeheattransportequationforrectangularenclosures[J].JHeatTransfer,1984,106(2):699-706.[8]TureloveJS.Discreateordinatesolutionsoftheradiativeheattransportequation[J].JHeatTransfer,1987,109(4):1048-1051.:(1980-),,,;(1955-),,,,;(1977-),,,,)()∗)()∗,;45%,CAEiCompendexAPIAJ)∗)∗)∗)∗,Ei(),(),,16,,,12.00,6,72.00CN112129/TE,ISSN10018719,82332,BM845,,::::18:100083:01062310752;01082368282Email:syxb8282@rippsinopec!com;syxb8282@163!com554