液固兩相流沖刷腐蝕數(shù)值模擬研究.pdf

1、北京化工大學(xué)碩士學(xué)位論文液固兩相流沖刷腐蝕數(shù)值模擬研究姓名：徐姚申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：化學(xué)工程指導(dǎo)教師：張政張建文2001.5.28J二奪ABSTRACTThereiswideindustrialbackgroundformulti—phaseflowerosionandcorrosion，whichincludescomplexflowandmass—transfertheoriesItisveryusefulandvaluable

2、tostudyerosionandcorrosionphenomenonfromboththeoreticalaspectandengineeringapplicationaspectInthispaper，acombinedmodelisusedtosimulateliquid—solidtwo—phaseflowThemodelthatisbuiltbycomputationalfluiddynamics(CFD)includest

3、hreemainparts：toobtainfluidfieldbysolvingReynoldstime—averagingequationsforfluidphaseunderEulercoordinatesystem，tosimulatesolidparticlephasebyusingstochastictrajectorymodeunderLagrangecoordiantesystem，togettheerosionrate

4、byadoptingFiunecuaingerosionequationmodifiedbyBergevinInordertovalidatetheaccuracyofthemodelandthecorrectnessofthecomputationprograminthispaperexperimentresearchiscarriedoutinthecollaborateinstitution，MetalCorrosionandPr

5、otectionInstituteofChinaAcademyofSciencesFluidfieldisstudiedunderdifferentdiskrotatingrateSomeimportantmacrovariables，suchasrotat，particlediameterandparticleconcentrationhavebeennumericallyexpaminedtogetthedetailmeanpart

6、icleimpactcharacterForfurtherunderstandingtheparticlemovementprocess，differentsizedparticle’SmovementtrackandparticleconcentrationdistributionarealsostudiedSomesignificativeconclusionsareobtainedattheendoftllisthesisFina

7、llythecomparisonoftheresultsofsimulationandexperimentshowsthatthemasslosstrendofthemetalsampleisaccordantThecomparsionindicatesthatthemodelinthethesisisbasicallycorrectandfeasibleSomesignificantsuggestionsareputforwardfo