简介:Thispaperpresentsanumericalanalysisofgas-solidseparationinarotationaltubeseparator.Thisseparatorwhichcollectsfineparticlesfromgasinlaminarflowiseffectiveforfineparticleseparation.TheseparationefficiencyandcriticalparticlediameteroftheseparatorweresimulatedusingCFDpackage(FLUENT6.0).Thesimulationshowedthatseparationefficiencycanbesignificantlydecreasedduetothepresenceofturbulence.ThesimulationalsoshowedthattheSaffmanliftforcehaslittleeffectontheefficiencyofthisseparator.Thecriticalparticlediameterofthistubeseparatorwasalsocalculatedtheoretically.Someexperimentaldatawereprovidedtovalidatethesimulationresults.Comparisonbetweenexperimentalresultsandsimulationpredictionsonseparationefficiencyshowedsatisfactoryagreement.
简介:Experimentalresultsarepresentedforsuperfluid(HeⅡ)flowthroughporousplugliquid-vaporphaseseparators.Testshavebeenperformedonsevenporousplugswithdifferentthicknessesordifferentpermeabilities.Thetemperaturewasmeasuredfrom1.5Kto1.9K.Twoflowregionswereobservedinsmallandlargepressureandtemperaturedifferencesregionsrespectively.Theexperimentaldataarecomparedwiththeoreticalpredictions.Theperformanceandapplicabilityofthebasictheoryarediscussed.Hysteresisoftheflowrateisalsoobservedanddiscussed.