tionperiodofthedrum,thetimefractionoffluidatanypointonthecrosectionofpipeflowingintoeachchaelisequal,sothedrumseeminglyactsasatimecontrolledswitchwhichequallydirectsthetotalflowintoeachchael,theextractiontimefractionandextractionratioisproportionaltothenumberofextractionchaelsandequaltotheratioofextractionchaelnumbertothewholechaelsinthedrum．aningeniousproofwasmadeinthethesis,andafurthermodifiedequationtocoidertheeffectofliquidleakagethroughthegapbetweendrumandshellwasestablishedtoo.
4.swirlertype.contrasti
ngtotherotationaldrumdistributor,thereisnoanyruingpartsinaswirlerdistributorthatisverysuitableforuseinengineering．byusingtwoorthreeswirleraemblesandconditioners,thetwo-phasemixtureitselfisguidedtopathroughaecialroutingtocompletetheequaldistributioninamulti-chaelaembleinwhicheachchaelhasthesamegeometricalshapebutisnotcoectedeachother．theoutputsofthemostchaelsisdirectedtothedownstreamofthepipe,onlyafewofextractionchaelsiscoectedtotheseparator．therefore,theflowrateofthestream(theextractedstream)enteringtheseparatorisonlydependentonthenumberofchaels(theextractingchael)coectedtotheseparatorandisindependentoftheflowpatternandotherfactors,sotheextractionratioremaincotant．
experimentsforthefourtypesofesmtwo-phaseflowmetersmentionedabovewereconductedinanair-watertwo-phaseflowloop．theierdiameteroftheloopwas30mmandthetestsectionwashorizontallyplaced．thepreureandtemperaturewerenearthatatroomconditio．theairsuperficialvelocityrangedfrom4to40m/s,andthewatersuperficialvelo
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