Laval喷管内甲烷-乙烷混合气体低温液化特性

2，，[1]。Laval，，、，（）、、[2-4]。，、，，、，FLUENTLaval，，Laval。1Laval、、4。R1=20mm，L1=50mm；[5-6]，，，L2=56mm；，R*=5mm；，10000s-1，L3=71.28mm，R3=6.15mm。，Laval，Laval，1。2，[7-11]。（），、；，。，、、。：2017-09-04；：(2016YFC0802302，2016YFC0802304)，(51274232，51406240)，(ZR2014EEQ003)；：(1992-)，，，，Email:[e-mail]；*：(1966-)，，，，、、，Email:[e-mail]。Laval-1，1*，2，3，1(1.（），266580；2.，510620；3.，257000)：Laval-，，-，，，-，：，-，，Laval、，；00.879×1021m-3·s-1（x=0.139m）；Laval4.476×10-7kg-1，4.462×1014m-3，6.089%。：Laval；-；；；：TE64：A：1001-9219(2018)02-69-061LavalFig.1StructurediagramoftheLavalnozzle：Laval-69201843—C1（1）：（2）：（3）：，ui、uj，m/s；ρv，kg·m-3；ρ，kg·m-3；p，Pa；μ，kg/(m·s)；δijKroneckerdelta；E，J/kg；keff，W/(m·K)；τeff，；Sm、Su、Sh、SY、、、；Sm-c2；J，1/(m3·s)；Y，；rd，m；drd/dt，m/s；N，1/kg；ρL1，kg/m3；ρL2，kg/m3；M1、M2、，kg/mol；m1、m2、，kg/(m3·s)；m3、m4、，kg/(m3·s)；x1、x2、；y1、y2、。[12]，，。，Gyarmathy，kr[13]：、，drd/dt[14]：，λV，W/(m·K)；PrvPrandtl；γ；hLV，J/kg；Ts，K。Kn：，l，m。，，NIST。3Laval，，、、。(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)702：10-6；、、10-3；0.05%，。Laval，：：，6MPa，270K，10%。：，Laval，Laval，。：、、。4，（）-，2。：Laval0.586MPa，288.05K，98.1%，84:16，323.78Nm3/h，Laval3，，，。5Laval，、、，。Laval，、，4~6Laval-、、。1-；2-；3-；4-；5、6-；7-；8-；9-；10、17-；11、15-；12-；13-Laval；14-；16-2Fig.2Flowchartofthesupersoniccondensationandflowexperimentalsystem3LavalFig.3ComparisonofpressuredistributiondataintheLavalnozzle4LavalFig.4ComparisonofgaspressuredistributionintheLavalnozzle：Laval-71201843—C1、、：，，Laval，，。，Laval，。，-，Laval，。，[15]。，，。，[15]，，-，。6-7~10Laval-，：、、。，Laval，（x=0.134m），，x=0.139mJ=0.879×1021m-3·s-1。，Laval，。、。，Laval，，5LavalFig.5ComparisonofgasMachnumberdistributionintheLavalnozzle6LavalFig.6ComparisonofgastemperaturedistributionintheLavalnozzle7LavalFig.7NucleationratedistributionintheLavalnozzle8LavalFig.8DropletradiusdistributionintheLavalnozzle722，，，，Laval，4.476×10-7m。，LavalLaval，（x=0.133m），，，N=4.462×1014kg-1。，。、，Laval，，。Laval，x=0.140m，Laval6.089%。7Laval，-，，，-，：(1)Laval，。(2)，，，-，Laval，。，。，，。(3)，00.879×1021m-3·s-1（x=0.139m），，，0。，，，Laval，4.476×10-7m。Laval4.462×1014kg-1，6.089%。(4)，Laval-，Laval，（，）、（、、），Laval。[1]，，，．[J]．—C1，2015，40(3):88-93.[2]OkimotoF,BrouwerJM.Supersonicgasconditioning[J].WorldOil,2002,223:1170-1178.[3]，，，．[J]．，2012，32(7):77-79.[4]BianJ,JiangWM,TengL,etal.Structureimprove-mentsandnumericalsimulationofsupersonicseparators9LavalFig.9DropletnumberdistributionintheLavalnozzle10LavalFig.10LiquidmassfractiondistributionintheLavalnozzle：Laval-73201843—C1[J].ChemEngProcess,2016,110:214-219.[5]，，，．[J]．，2007，27(7):112-114.[6]，，，．Laval[J]．，2016，44(12):67-71+76.[7]．[M]．：，1987.[8]，，．[J]．，2014，13(3):198-205.[9]JiangWM,BianJ,LiuY,etal.Investigationofflowcharacteristicsandthecondensationmechanismofternarymixtureinasupersonicnozzle[J].JNatGasSciEng,2016,34:1054-1061.[10]，，，．[J]．（），2008，23(1):56-60.[11]YangY,WaltherJH,YanYY,etal.CFDmodellingofcondensationprocessofwatervaporinsupersonicflows[J].ApplThermEng,2017,115:1357-1362.[12]，，，．[J]．（），2017，33(2):273-280.[13]．[D]．：，2010.[14]BianJ,JiangWM,HouDY,etal.CondensationcharacteristicsofCH4-CO2mixturegasinasupersonicnozzle[J].PowderTechnol,2018,293:1-11.[15]．[D]．，2010.Lowtemperatureliquefactioncharacteristicsofmethane-ethanemixedgasintheLavalnozzleBIANJiang1,CAOXue-wen1,YANGWen2,LIUYang3,JIANGWen-ming1(1.CollegeofPipelineandCivilEngineering,ChinaUniversityofPetroleum,Qingdao266580,China;2.SouthChinaBranch,SinopecSalesCo.,Ltd.,Guangzhou510620,China;3.PetroleumDevelopmentCenterCo.,Ltd.,SinopecShengliOilfield,Dongying257000,China)Abstract:Inordertomakeclearmethane-ethaneliquefactioncharacteristicsoftheLavalnozzleandobtainflowandcondensationparametersinthesupersonicliquefactionprocessofnaturalgas,themathematicalmodelforthesupersoniccondensationflowofmethane-ethanemixedgaswasestablished,andtheexperimentalverificationofgascondensatephasetransitionofdoublecondensablecomponentswascarriedout.Theflowfieldcharacteristicsundertheconditionofcondensationflowandisentropicflowwerecompared,andlowtemperatureliquefactioncharacteristicsofmethane-ethanemixedgasintheLavalnozzlewerestudied.Theresultsshowedthatwhenthecondensationoccurs,aweakcondensationshock-waveemergedintheflowofmethane-ethanemixedgas,comparedwiththeisentropicexpansionprocess,thepressureandtemperatureatoutletoftheLavalnozzleincreased,andtheMachnumberdecreased.Inaveryshortdistance,thenucleationratesharplyincreasedfrom0sharplytoamaximumvalueof0.879×1021m-3·s-1(approximatelyatx=0.139m);themaximumdropletradiusintheLavalnozzlewas4.476×10-7m;themaximumdropletnumberwas4.462×1014m-3;andthemaximumliquidmassfractionwas6.089%.Keywords:Lavalnozzle;methane-ethane;liquefaction;condensation;numericalsimulation!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!（ZionMarketResearch）“HydrogenMarketbyDeliveryMode(Captive,Merchant),byTechnology(SteamMethaneReforming,PartialOxidationofOil,CoalGasification,ElectrolysisofWater)andbyEndUser(Chemical,PetroleumRefining,MetalProcessing,AutomotiveFuel,GlassIndustry,EdibleFatsandOils,Energy,andOthers):GlobalIndustryPerspective,ComprehensiveAnalysisandForecast,20172023”。，20171292.5，20231833.4，2017