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1、湘潭大学硕士学位论文搅拌釜反应器内流体流动的CFD数值模拟姓名：韩路长申请学位级别：硕士专业：化学工程指导教师：刘跃进20050501搅拌釜反应器内流体流动的CFD数值模拟93[102]S.Jain.Three-DimensionalSimulationofTurbulentParticleDis-persion[D].Utah：UniversityofUtah，1995.[103]D.I.GrahamandP.W.Jame.Turbulentdispersionofparticlesusingeddyint
2、eractionmodels[J].Int.J.MultiphaseFlow，1996，22(1)：157-175.[104]Gosman,A.D.andIoannides,E.Aspectsofcomputersimulati-onofliquid-fuelledcombustors[C].PaperAIAA-81-0323,prese-ntedatAIAA19thAero.SciencesMeeting,inSt.Louis，MO：1981[105]樊建人,赵华，芩可法.气固两相流动的湍流脉动扩散数学模型
3、及其应用[J].应用力学学报，1990，7(1)：50-55.符号说明T－釜直径（＝液面高度），mD－桨直径、mr－距釜中心轴距离（半径），mR－桨半径，miz－距桨平面高度（指向釜底为正），m−1V－平均速度，ms⋅σ－湍动动能Prandtl数kσ－耗散频率Prandtl数εN－搅拌转速，rpsV－叶端速度，ms⋅−1tip22−k－湍动动能，ms⋅ε－能量耗散速率，ms23⋅−N－功率准数P搅拌釜反应器内流体流动的CFD数值模拟2AbstractStirredtankreactorsareextensiv
4、elyusedinavarietyofindustrieslikethepaperandpulp,pharmaceutical,finechemicals,foodindustry,petroleumchemicalengineering,pharmacyandbiochemicalengineeringetc.Indesigningsuchreactors,understandingthefluiddynamicsiscriticalparticularly.Untillrecently,dimension
5、lessnumbersandempiricalcorrelationshavebeenusedastoolsfordesign,scale-upandoperationofstirredtanks.Sincetheturbulentthree-dimensionalflowofsingleormultiphasefluidarecomplexinstirredtanks,thesedimensionlessnumbersandempiricalrelationsareclearlyinadequate.Som
6、eresearchershavegivensomesimplifiedmathimaticalmodels,butthesemodelsintensivelydependonexperimentaldata.Tofullyunderstandtheprocessesoccurringinstirredtanks,mathematicalmodelingoflocalhydrodynamicbehavioraredesiredindepth.Thisthesisisdevotedtotheabovetaskso
7、nthebasisofcomputationalfluiddynamics(CFD).Inaccordancewiththeanisotropicfeatureofturbulentflow,ananisotropicreynoldsstressmodel(RSM)isadoptedtopredicttheturbulentflowfieldandturbulentcharacteristicsgeneratedbyaRushtondiscturbinewiththeslidingmeshiterativep
8、rocedure.Thediscretizationschemeofdiffusiontermhasanimportanteffectonthepredictionofturbulentparameters.QUICKdiscretizationschemeshowsgoodabilitytoaccelerateconvergenceandimproveprecision.Thepredictedt
