수치해석을 이용한 담수장치용 이젝터의 노즐위치 변화에 따른 이젝터 유동특성 연구
CFD Analysis on the Flow Characteristics of Ejector According to the Position Changes of Driving Nozzle for F.W.G
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참고문헌
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초록
Inthisstudy,theejectordesignwasmodeledusingFluent6.3ofFVM(FiniteVolumeMethod)CFD(Computational FluidDynamics)techniquestoresolvetheflow dynamicsintheejector.A vacuum system withtheejectorhasbeen widelyusedbecauseofitssimpleconstructionandeasymaintenance.Ejectoristhemainpartofthedesalination system,ofwhichdesignsdeterminetheefficiencyofsystem.Theeffectsoftheejectorwasinvestigatedgeometry and theoperating conditionsin thehydrauliccharacteristics.Theejectorconsistsmainly ofanozzle,suction chamber,mixingtube(throat),diffuseranddrafttube.Liquidissuppliedtotheejectornozzle,thefastliquidjet producedbythenozzleentrainsandthenoncondensablegaswassuckedintothemixingtube. ThemultiphaseCFD modelingwascarriedouttodeterminethehydrodynamiccharacteristicsofseawater-air ejector.Conditionofthesimulationwasvariedinentrancemassflow rate(1kg/s,1.5kg/s,2kg/s,2.5kg/s,3kg/s),andpositionofdrivingnozzlewaslocatedfrom thecentralaxisofthesuctionat-10mm,0mm,10mm,20mm,30mm..Asaresult,suctionflow velocityhasthehighestvalueincentralaxisofthesuction.
Abstract
Inthisstudy,theejectordesignwasmodeledusingFluent6.3ofFVM(FiniteVolumeMethod)CFD(Computational FluidDynamics)techniquestoresolvetheflow dynamicsintheejector.A vacuum system withtheejectorhasbeen widelyusedbecauseofitssimpleconstructionandeasymaintenance.Ejectoristhemainpartofthedesalination system,ofwhichdesignsdeterminetheefficiencyofsystem.Theeffectsoftheejectorwasinvestigatedgeometry and theoperating conditionsin thehydrauliccharacteristics.Theejectorconsistsmainly ofanozzle,suction chamber,mixingtube(throat),diffuseranddrafttube.Liquidissuppliedtotheejectornozzle,thefastliquidjet producedbythenozzleentrainsandthenoncondensablegaswassuckedintothemixingtube. ThemultiphaseCFD modelingwascarriedouttodeterminethehydrodynamiccharacteristicsofseawater-air ejector.Conditionofthesimulationwasvariedinentrancemassflow rate(1kg/s,1.5kg/s,2kg/s,2.5kg/s,3kg/s),andpositionofdrivingnozzlewaslocatedfrom thecentralaxisofthesuctionat-10mm,0mm,10mm,20mm,30mm..Asaresult,suctionflow velocityhasthehighestvalueincentralaxisofthesuction.
참고문헌 (5)
- Fluegel,G, "Berechnung von strahlapparaten,VDIForschungsheft395 AusgabeB Band10", ~ (1939)
- Witte,J.H, "Efficiencyanddesignof liquid-gasejector", Britishchemicalengineering, 10(9), pp.602~607 (1965)
- 지명국, "공기구동 이젝터의 노즐 형상과 위치 변화에 따른 성능 특성", 한국마린엔지니어링학회지, 32(4), pp.550~556 (2008), 한국마린엔지니어링학회
- 황인선, "태양에너지 이용 저압 증발식 해수 담수시스템 이젝터 CFD 해석", 한국태양에너지학회 논문집, 30(6), pp.137~143 (2010), 한국태양에너지학회
- 지명국, "기액 이젝터의 성능특성에 관한 매개변수적 연구", 박사, pp.2008