圓管螺旋流特性及其減緩氧化鋁管道結(jié)疤機(jī)理的研究.pdf

1、I分類號(hào)：密級(jí)：公開(kāi)公開(kāi)學(xué)號(hào)：2006027單位代碼：10407碩士學(xué)位論文論文題目:圓管螺旋流特性及其減緩氧化鋁管道結(jié)疤圓管螺旋流特性及其減緩氧化鋁管道結(jié)疤機(jī)理的研究機(jī)理的研究研究方向物料管道輸送物料管道輸送專業(yè)名稱機(jī)械設(shè)計(jì)及理論機(jī)械設(shè)計(jì)及理論研究生姓名許睿許睿導(dǎo)師姓名、職稱林愉林愉教授教授2009年10月28日江西贛州IIIAbstractThephenomenonofAluminascarringduringthealuminap

2、roductionisverycommonalloverthewld.Regardlessofwhatmethodstobeusedit’sscarredofthesolidmaterialonthefaceoftheproductionequipmentthewallofpipeline.Ithasseriouslyaffectedtheefficiencyofproduction.Atpresenttherearesomeappro

3、achestodealwithscarringproblem:mechanicalcleanuptheflameshighpressurewaterchemicalcleaning.Buttherearestilltwoquestions.Onefalongtimecleaningtheotherisnotthoughlycleaned.Inawditisnotsatisfacty.Tobreakthroughthebottleneck

4、whichrestrictingtheproductionofaluminawearecommissionedtocarryoutthestudyof“Toreducethepipelinescarringduringtheproductionofaluminabytheflowingstructure.“Anewtypeofsimplemethodsisattemptingtobeestablished.Sothattheflowin

5、gstructurewillbechangedfromstraighttospiralthesolidgranulewillbestoppedtoclosewiththewallinthepipelinethescarringvelocitywillbereduced.Basedontheacteristicsofspiralflowthebasicequationtheexpressionsofvelocitythepressured

6、istributingthelossofenergyisestablishedtheruleofattenuationthelengthofspiralflowisdiscussedthemovementofthegranulethecutstrengthisanalyzedtheprincipletoreducethepipelinescarringisopenedout.Thenthemodelofspiralstraightflo

7、waresetupbythesoftwareofGambit.TheemulatisdesignedbythesoftwareofFluent.Thenagroupofsimulationdatatsarecalculatedbyaseriesofsimulation.thevelocityfieldthepressurefieldthewallshearstressthespiralattenuationlawtheparticles

8、trajectyofspiralflowinpipegetfurtheranalysis.Consequentlythecrelationequationcalculationfmulaisvalidated.Providingcomparingwiththeeticalanalysiscomputeranalogsimulationconclusionthatthemethodofchangingthestraightflowtosp

9、iraltoreducethescarringisviableinpractice.Thispaperisthebasictheypartofthestudy.Byresearchingofthedynamicskinematicsacteristicsofthespiralflowinpipesthemechanismthefeasibilityofspiralflowtoslowdownpreventthepipelinescarr

10、ingisprobedinto.Itprovidestheeticalsuppttechnicalguidanceftheproject.Atthesametimetheresearchoftheacteristicsparametersofthespiralflowhasanimptantmeaningtothefieldofengineeringfluidmechanics.Keywds:Spiralflowthefieldoffl