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铸造充型过程三维流场数值模拟技术研究

发布时间:2016-08-04 14:00

  本文关键词:铸造充型过程三维流场数值模拟技术研究,由笔耕文化传播整理发布。


学位论文

武汉理工人学硕士学位论文

Abstract

Ourcountryhasabigfoundryindustry,butthere

canaremanydefectsinthecastingsduetothelOWtechnologicallevel.SOitnotberegardedasapowerful

country.Withthedevelopmentinthetechnologyofcomputationalfluiddynamics.

athenumericalsimulationofcastinghasgrownmuchmature,andbecome

becauseithasimportantscientific

catchupwiththe

Onthebaseofsummarizing

thePaperestablishedareliablewayofscientificanalysis.TheresearchshouldbeactivelycarriedoutinChina,andintemationaladvancedapracticalvalueforthefoundryindustrytolevel.varietyofmethodswhichsimulatetheflowfield,mathematicalmodelformoldfillingprocessaccordingtogoverningequationofMomentumandcontinuity,thenusingfinitedifferencemethodtodiscretethemodelinspaceandtimedomain,whileapplicating“straggergridmethod”tosolvetheproblemsofunreasonableiterationresults.suchas‘'waveform’’or“board.shaped”velocityandpressurefield.casedbyordinarydiscretemethod.Intheprocessofnumericalsimulation.establishedtheflowcharttosolvetheflowfieldaccordingtoSOLAalgorithm,and

onderivedasimpleandeffectivemethodtotreatthefreesurfacebased

thechangesofflowandgetaVOFmethod,whichCancalculatenewsolutionbasin.Repeatedtheprocessaboveto

ensurecompletetheentireriverbasinflowfieldsolution.Inorderto

processthecalculationcardedoutsuccessfully,theboundary

usesconditionsofvelocityandpressurealSOhasbeenreasonableset.Inprogramdesigning,thepaperobject orientedprogramming

amethod,independentlydevelopedamodulewhichpossessesflowfieldcomputingfunctionsandintegrateditselfintothemainprogr锄throughunifiedconnectorwhich

integratedthefunctionsof3Ddisplaying,meshgeneration,,numericalsimulationanddynamicsimulation.Thesoftwarehassimple,friendlyinterfaceandwell-stmcted,andthe

well.programhasgoodscalability,maintainabilityandreliabilityas

Finally,bycomparingthepicturesofBenchMarktestingblockexperiment、析tllthecomputersimulatingresults.itfoundthatthesimulationarebasicallyconsistentwiththeexperiment.theresultsreflecttheobjective1awoffluidflowandshowthatthemathematicalmodel,flowfieldcalculationmethodsand

approacharefundamentallyright.Thesoftware

deeperstudyinthefuture.boundaryconditionsCanbeappliedtothesimulationofsomesimplecasting.however,therearesomeinaccuracyindetailwhichneeds

Keywords:FillingProcessofCasting,SOLA-VOFAlgorithm,FreeSurface,

BoundaryCondition

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  本文关键词:铸造充型过程三维流场数值模拟技术研究,由笔耕文化传播整理发布。



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