Experimental investigation on inner two-phase flow in counter-flow spray saturator for HAT cycle .pdf

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1、AppliedThermalEngineering26(2006)2417–2424www.elsevier.com/locate/apthermengExperimentalinvestigationoninnertwo-phaseflowincounter-flowspraysaturatorforHATcycleYuzhangWang*,YixingLi,ShilieWengSchoolofMechanicalEngineering,KeyLaboratoryforPowerMachineryandEngineeringofMinistryofEducationPRChina,S

2、hanghaiJiaoTongUniversity,1954HuashanRoad,Shanghai200030,People’sRepublicofChinaReceived20February2006;accepted20February2006Availableonline31March2006AbstractAnexperimentinvestigationofinnertwo-phaseflowinthecounter-flowspraysaturator(CFSS)forhumidairturbine(HAT)cycleandthesimulationofthemoving

3、distanceofwaterdropletsincounter-flowairarepresentedhereaimedattheunderstandoftwo-phaseflowintheCFSSindetailed.DualphaseDoppleranemometry(DualPDA)systemisappliedtoobtainthespatialchangeofthedropletsizespectrumintheflow-fieldtocorrelatedropletsize–velocitycorrelation.Thelocalmeasurementprofilesof3Dm

4、eanvelocitiesanddiametersofwaterdropletsareobtainedbyaveragingdropletsizeclasses.Moreover,DualPDAsignalprocessingallowsforaccuratedeterminationofthevolumefluxofsphericalwaterdroplets.Thetransientvelocityfieldsaremeasuredbyalaser-basedparticleimagevelocimetry(PIV)system.ThecommercialCFDsoftware,F

5、LUENT,isusedtosimulatethemaximummovingdistanceofwaterdrop-letswithdifferentdiametersandinletvelocitiesinthecounter-flowairwithdifferentinletvelocities,thenthequantityofwaterdropletentrainmentinthesaturatorcanbeestimated.Ó2006ElsevierLtd.Allrightsreserved.Keywords:HATcycle;Saturator;PDA;PIV;Two-ph

6、asefluid1.Introductionforasustainableuseoftheavailablefuels.Advancedpowercyclesbasedongasturbinescanmeettheserequire-Theworldenergydemandhasincreasedsteadilyandments,sincegasturbineshaverelativelyhighefficiencies,willcontinuetoincreaseinthefuture:theInternationallowspecificinvestmentcosts(USD/kWe)

7、,highpower-to-EnergyAgency(IEA)predictsanincreaseof1.7%peryearweightratiosandlowemissions.Therefore,theuseofgasfrom2000to2030.Thisincreasecorrespondstotwothirdturbineinthepowergenerationindustryhasincreasedcon-ofthecurrentprimaryenergyd