yasmallportionofthetotalflowisextracted,theseparatorcanbereduced5~20timesinsizecomparedwiththetraditionalseparationtechniqueinwhichallthetwo-phasemixtureisseparated,andthevolumeofthetwo-phaseflowmetermaynearlyreachthebulkofacommonsinglephaseflowmeter.furthermore,theesmisalsomuchbetterthanthemostnon-separatingmethodsinreliability、stability、precision、measuringrangeandsoon.becausetheitrumentsutilizedinesmsystemworkinthesinglephaseflow,themeasurementresultswouldnotbeinfluencedbytheflowpatterandthetraitnatureofthetwo-phaseflow.
howthe“proportionalextraction”canbearoachedtoaurethattheextractedstreamistherepresentativeoftotalfluidstreamortheextractionratioisstable,isthemajortaskofthethesis.howtocotructsuchdistributorsisthekeyproblemtobesolvedinthethesis.fourbasictypesofdistributorwereproposedandstudiedinthethesis:
1.thet-junctiontypebyutilizingthephaselitphenomenaint-junctio,asingle-phasegasstreamisextractedandseparatedfromthetotalfluidstream,andaconventionalflowmeterisprovidedtometerthegasflowratewhichthenisusedtocalculatethemaflowrateormaqualityofthetwo-phasemixturetobemeasured.thejunctionotonlyactasadistributorbutalsoaseparator.basedonaseriesofexperiments,thebasicequatioontheextractionloopandthemainloopwereproposedandtheequationofextractionratiowasalsoderivedcoequentlywhichshowthattheextractionratioisnotacotant,itvarieswiththemaqualityaccordingtoalinearfunction.onlyoneoftheparameters(theflowrateormaquality)canbedeterminedbythemeteredvalueofextractedgasflow,anotherparameterh
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