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简介：Anewdual-fluidmodelconsideringphasetransitionandvelocityslipwasproposedinthispaperandtheCunninghamcorrectionwasusedinthedropletresistancecalculation.Thisdual-fluidmodelwasappliedtothenumericalsimulationsofwetsteamflowina2DLAVALnozzleandintheWhitecascaderespectively.Theresultsoftwosimulationsdemonstratethatthemodelisreliable.Meanwhile,thespontaneouscondensingflowinWhitecascadewasanalyzedanditinfersthattheirreversiblelosscausedbycondensationaccountsforthelargestshare(about8.78%ofinlettotalpressure)intotalpressurelosswhilethelosscausedbyvelocitysliptakesthesmallestshare(nearly0.42%),andanotherpartoftotalpressurelosscausedbypneumaticfactorscontributesalesssharethancondensation,i.e.almost3.95%ofinlettotalpressure.

简介：噪音在250下面由变动浸透的蒸气流动导致了

简介：Wastebiomassisalwaysgeneratedduringtheproductionprocessinindustries.Theordinarywaytogetridofthewastebiomassistosendthemtolandfillorburnitintheopenfield.Thewastemaypotentiallybeusedforco-firingwithcoaltosavefossilfuelconsumptionandalsoreducenetcarbonemissions.Inthiscasestudy,thebio-wastefromaNicotianaTabacum（NT）pre-treatmentplantisusedasthebiomasstoco-firewithcoal.ThesamplesofNTwasteswereanalysed.Itwasfoundthatthewasteswereoftherelativelyhighenergycontentwhichweresuitableforco-firingwithcoal.ToinvestigatethepotentialandbenefitsforaddingNTwastestoaFluidisedBedCombustion（FBC）boilerintheplant,detailedmodellingandsimulationarecarriedoutusingtheEuropeanCoalLiquefactionProcessSimulationandEvaluation（ECLIPSE）processsimulationpackage.ThefeedstockblendingratiosofNTwastetocoalstudiedinthisworkarevariedfrom0%to30%.TheresultsshowthattheadditionofNTwastesmaydecreasetheemissionsofCO2andSOxwithoutreducingtheboilerperformance.

简介：CuO-CeO2catalystswerepreparedbyaureaprecipitationmethodfortheoxidativesteamreformingofethanolatlow-temperature.Thecatalyticperformancewasevaluatedandthecatalystswerecharacterizedbyinductivelycoupledplasmaatomicemissionspectroscopy,X-raydiffraction,temperature-programmedreduction,fieldemissionscanningelectronmicroscopyandthermo-gravimetricanalysis.OverCuOCeO2catalysts,H2withlowCOcontentwasproducedinthewholetestedtemperaturerangeof250–450C.Thenon-noblemetalcatalyst20CuCeshowedhigherH2productionratethan1%Rh/CeO2catalystat300–400Candtheadvantagewasmoreobviousafter20htestingat400C.TheseresultsfurtherconfirmedthatCuO-CeO2catalystsmaybesuitablecandidatesforlowtemperaturehydrogenproductionfromethanol.