A Numerical Simulation method of a Natural Draft Counter flow of Cooling Tower based on the FLUENT英文文献资料

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1、ANumericalSimulationmethodofaNaturalDraftCounterflowofCoolingTowerbasedontheFLUENT1112ZhaoShunan,LiLujun,GuoFumin,FengJing1ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing,ChinaTel.:+861068781608;Fax:+861068538685;Email:bjcc@iwhr.com2NorthChinaPowerEngineeringCo.,Ltd,Beijing,ChinaAbstract

2、:Mostofthe3DnumericalsimulationsofanaturaldraftCounterflowcoolingtowerarecompletedbyusingsoftwareFLUENT.DuetotheFluentisnotspeciallydesignedforthesimulationofthecoolingtower,theheatexchangerandresistancemodelsuppliedbyfluentdoesnotworkwellwiththepredictionoftheperformanceofthecoolingtower.Sooneheate

3、xchangerandresistanceanalysismodelmustbeestablishedbytheuserdefinefunctionoftheFLUENTsoftware.Inthispaper,theMerkeltheorywasembeddedintothediscreteparticlemodelofFLUENTsoftwareandthenthe3Dnumericalsimulationmethodofthewetnaturaldraftcoolingtowerwasestablished.Thecomparisonsbetweenthesimulationresult

4、sandthefieldtestresultswereagreementwellwitheachother,sothesimulationmethodputtedforwardinthispapercouldbereferredforthedesignandoptimizationofthecounterflownaturaldraftcoolingtower.Keywords:3Dnumericalsimulation;wetcoolingtower;Fluent;naturaldraft.0.IntroductionNaturaldraftCounterflowcoolingtoweris

5、importantforthefireand/ornuclearpowercirculatingwatersystem,anditisthecoldendofthecondensationofthesteamexhaustoftheturbine.NaturaldraftCounterflowcoolingtowerreliesonthedensitydifferencebetweeninsideandoutsideofthetowertopromotetheairflowandtakesawaytheheatofthecirculatingwatertotheatmosphere.Gener

6、allythedistributionoftheflowcanbeseenastheaxissymmetrictwodimensionintheabsenceofthecrosswind.However,thedistributionoftheairflowinthetoweristhreedimensionalinthepresenceofthenaturalwind.Inaddition,thetwodimensionalsimulationmodelisnotfitforthedealwiththeoptimizationoftheinsidestructureofthetowerand

7、theresearchoftheinfluenceoftheun-uniformwaterdistribution.ThereforeitisverydeservedtostudythethreedimensionalnumericalsimulationmodelofthenaturaldraftCounterflowcoolingtoweratthepointsofthetheoryandth