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1、关键词：T形管；相分离；有机工质；环状流；数值模拟；实验研究I万方数据AbstractGas-liquidseparatorisofimportanceandwidely-usedinthethermodynamiccyclesinceitisalwaysrequisite.Amongthedifferenttypesofgas-liquidseparators,Tjunctionismuchsimpler,compacter,moreintegratedandcheapercomparedwithothersepar
2、ators.What’smore,theeffectivenessoftheTjunctionhasalreadybeenproved.Therefore,itisapromisingseparatingdevice.Inthepaper,gas-liquidtwo-phaseseparationintheTjunctionisregardedasthestudyobject,whichisaimedatunderstandingandestablishingthephase-separationtheoryandnu
3、mericalmodelintheTjunction,makingtheTjunctionphase-separationefficiencyclear,andstudyingtheinfluenceoftheTjunctionparametersonthephase-separationefficiency.Thus,theinvestigationandanalysisoftheTjunctionphase-separationfortheorganicworkingfluidareunfoldedbasedont
4、henumericalstudyandexperimentalexploration.BecauseofthesignificantinfluenceoftheinletflowpatternontheTjunctionphase-separation,thispaperfirstlyconductsanumericalsimulationofaspecificflowpattern----annulartwo-phaseflowwhichalwaystakesplaceinthestraightpipebeforeT
5、junction.TheentrainmentanddepositionprocessofthedropletsinannularflowisconsideredintheCFDmodeloftheannularflow.Secondly,thenumericalmodeloftheannulartwo-phaseflowseparationfortheorganicworkingfluidintherun-typeTjunctionisestablishedinthispaper.Thenumericalsimula
6、tionisconducted,inwhichtheEulerianmodelisappliedtodescribethegas-liquidtwo-phaseflowandtheinterfacialdragistakenintoaccount.Thereafter,theexperimentalinvestigationofthephase-separationperformanceintheverticalimpactTjunctionwhichisusedasagas-liquidseparatoriscond
7、ucted.TheworkingfluidsthatarestudiedintheexperimentareR134aandR245fa.Thehigh-speedcameraisemployedtoshoottheflowpatternintheupperoutletoftheverticalimpactTjunctioninordertoobtainthetransitionlineoftheflowpatternfrommistflowtochurnflow.Inthemeanwhile,theinfluence
8、oftheinletqualityandinletmassflowrateoftheTjunctionontheoutletparameters,vaporseparationefficiencyandliquidseparationefficiencyarestudiedandanalyzed.Atlast,theattempt
