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1、上海交通大学硕士学位论文电站锅炉燃烧器内气固两相流动的实验测量及数值模拟姓名：孙杰申请学位级别：硕士专业：热能工程指导教师：黄荣国20070201上海交通大学硕士学位论文EXPERIMENTALSTUDYANDNUMERICALSIMULATIONOFGAS-SOLIDTWO-PHASEFLOWINABURNEROFUTILITYBOILERABSTRACTThecoalburnerisanessentialpartinthewholeburningsystemofutilityboiler,inwhi
2、chthecharacteristicsofgas-solidtwo-phaseflowplayaveryimportantrollfortheefficiencyandstabilityofcoalburningintheboiler.Ifsolidparticleconcentration,velocityandturbulentkineticenergyofeachphasecanbepredictedaccurately,theoptimaldesignofstructureandworking
3、conditionofburnerswillbeexpected.Hencetheconcerningresearchhassignificantmeaningforengineeringapplications.Inthispaper,bymeansofexperimentalmeasurementandnumericalsimulation,thestudyofcold-stategas-solidtwo-phaseflowinanew-typeofcoalburneriscarriedout.Fi
4、rstly,thegas-solidtwo-phaseflowinaprimarypassageofthecoalburnerismeasuredbymeansof3D-PDA(ParticleDynamicAnalyzer),afterwhichtheparticlediameters,the3-Dvelocitiesandturbulentkineticenergiesofbothtwophasesareobtained.Withanalysisoftheexperimentalresults,th
5、emechanismofthegas-solidtwo-phaseflowintheburnerandtheinfluenceoftheinnerstructureofburnerontheflowfieldarediscovered,suchastheeffectof“twoelbow”structureandthefunctionofthestabilizer.Inthispaper,thedesignofexperimentalplatform,theprinciplesandtheoperati
6、onprocessoftheexperimentarestated,soissomeexploringworktosolvetheproblemsarisingfromtheexperiment.Secondly,withcommercialCFDsoftware,thenumericalsimulationiscarriedoutonthegas-solidtwo-phaseflowinaprimarypassageoftheii上海交通大学硕士学位论文burnerbymeansofmulti-flu
7、idmodelandparticletrajectorymodel.Inthewayofcomparingthecomputationalresultswiththeexperimentalresults,ononehand,amoreobjectiveandwell-roundedunderstandingofthetwo-phaseflowintheburnercanbeobtainedbymakingfulluseofeachstrongpointoftheexperimentalandnumer
8、icalmethods.Ontheotherhand,theshortcomingofeachmeanscanberevealed,whichwillhelpforthefurtherresearchandimprovement.Finally,basedontheanalysisofbothresultsfromexperimentalmeasurementandnumericalsimulation,someadvicesfordesi
