薄板坯連鑄結(jié)晶器內(nèi)電磁制動效果的數(shù)值模擬.pdf

1、分類號UDC密級學(xué)位論文薄板坯連鑄結(jié)晶器內(nèi)電磁制動效果的數(shù)值模擬作者姓名型鹽指導(dǎo)導(dǎo)師姓名奎盔皇堂撾盤墊鱟墊焦盟塞塾直盤重!量塞墜室申請學(xué)位級別巫學(xué)科類別三—芏專業(yè)名稱墊絲蘭猩論文提交H期!Q!!主!旦論文答辯日期!!!!生!旦學(xué)位授予日期——答辯委員會主席曼墨剛評閱人輦虹!絲遑苯東北大學(xué)2005年3月東北大學(xué)碩士學(xué)位論文AbstractTheNumericalSimulationofElectromagneticBrakeEffecti

2、ntheMoldofThinSlabContinuousCastingAbstractThethinslabcontinuouscasting，whichhasseveralcharacters，thatisthehi曲castingspeed，theshortproducingflowandthehighproductivityistheimportantdirectionofthecontinuouscastingtechnique

3、MoreoverthemoldisthecoreofthecontinuouscastingTostudythedistributionoftheflowfieldvelocityinthemoldCallmakethedesignofcontinuouscastingtechniquesoptimizedanditsqualityimprovedButtheimpacttothenarrowsideofthemoldathighcas

4、tingspeedwillleadtotheleakofsteelliquidMeanwhile，theaccidentthatthenonmetalinclusionsarerolledintothesteelliquidwillresultintheinteriorandexteriordefectsoftheproductsTheelectromagneticbrakeisoneofthemostpromisingmethodst

5、oensurethequalityofproductsundertheconditionofhighcastingspeed，asittailcontroltheflowactioninthemold，improvethequalityofproductsandreducetherateofwasterThispapertakesthefunnelshapedmoldastheresearchobjecttostudythecharac

6、teristiesoftheflowfieldinthemoldusingtheelectromagneticbrakesystemWiththehelpoftheCFDtosimulateflowfield，numeficalsimulationisusedonthebasisoftestifyingtheresultsinliteraturestoobtainthereasonablestructuralandoperatingpa

7、rameters，whichcallgivethetheoreticalbasisforthefurtherexperimentalresearchesBecauseuserdefinedfunctionsareneeded，aprogramisdevelopedtationalizethevelocitydistributionattheinletofthenozzle，initializethemagneticfieldandcom

8、putetheelectromagneticforceTheresultsshowthatwhenthecastingspeedisincreased，thefluctuationonthefluidsurfacewillbeincreasedOntheotherhand，theincreaseoftheimpingingintensityandthedepthofthesprayingflowenhancetheimpacttothe

9、solidificationshellandintensifytheflowattheundersideofthemoldWhentheimmerseddepthofthenozzleisincreased，thevelocityonthefluidsurfacetendstoincrease，becausethefluidflowspaceisdecreasedHoweveriftheimmerseddepthofthenozzlei

10、sincreasedtoomuch，thefluidsurfacewillberelativelystableOwingtotheincreaseoftheimpingingdepth，theimpairmentofthesolidificationshellmaybringaboutverysmallincreaseofthethicknessofthesolidificationshellattheundersideofthemol