Fluent对旋转式动力机械的分析(.ppt

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1、IntroductiontoRotatingMachineryAnalysisUsingFluentFrankKelecyFluentInc.AgendaIntroductionSinglemovingreferenceframe(SRF)modelMultiplemovingreferenceframe(MRF)modelMixingplanemodelSlidingmeshmodelQuestions?MotivationFlowsinvolvingrotatingdomainsoccurfrequentlyinengineer

2、ingExamplescompressorsandturbinesfansandpumpsrotatingcavities,seals,andbearingsmixingequipmentfluidcouplingdevicesandtorqueconvertersairmotorsmarineandaircraftpropellersandmanymore…ComputationalFluidDynamics(CFD)todayplaysacentralroleinthedesignandanalysisofrotatingmach

3、ineryExamplesofRotatingMachinerygasturbineengineautomotivewaterpumptubeaxialfansteamturbineHVACblowerunithydroturbineGoalsoftheTrainingProvideanintroductiontorotatingmachinerymodelingExaminethefourmajorclassesofrotatingmachineryproblemsSinglerotatingreferenceframe(SRF)M

4、ultiplerotatingreferenceframe(MRF)MixingplaneSlidingmeshPresentdetailsonmodelingrotatingmachineryproblemsusingFluentModelsetupSolutionprocess(steady-stateandunsteady)Answeryourquestions!TypesofRotatingMachineryInthiscourse,wewillclassifyrotatingmachineryasfollows:Turbom

5、achinery-machineswhichaddworktoorextractworkfromafluidcompressors,fans,pumps-addworktoachieveapressureriseinthefluidturbines,windmills-extractworkfromfluidtodriveothermachinesMixingequipment-machineswhicharedesignedtomixfluid(andpossiblysolid)materialsforuseinachemicalp

6、rocessingapplicationindustrialmixingtanksRotatingtanks,seals,cavities,andotherdevicesdiskcavitiesandlabyrinthsealsingasturbineengineselectricmotorcoolingpassagesdiskdrivesrotatingtiresonautomotivevehiclesAlloftheseapplicationsinvolverotatingsurfacesanddomains(andthusmay

7、usearotatingreferenceframeformodeling)ClassificationofTurbomachineryAxialmachinesFlowthroughthemachineis(ingeneral)alignedwiththeaxisofrotationExamples:propellers,axialfans/compressors/turbines,swirlersCentrifugalmachinesFlowthroughthemachineis(ingeneral)perpendicularto

8、theaxisofrotationExamples:liquidpumps,centrifugalfans/compressors,radialturbinesMixedFlowFlowthroughthemachine