第2期 于洋等：钢连铸电磁搅拌工艺中流场的数值模拟 。159° ◆0.022ms-1 ◆013ms1 (a) ) ◆0.13m8 0.13ml d 图2水平剖面流场分布.（未施加电磁场时弯月面的流场：（施加电磁场时弯月面的流场：(9施加电磁场时搅拌器中心处的流 场：（山施加电磁场时出口处的流场 Fig 2 Vecprdistrbutins of the fow feld on xy horgontal plnes (a)menscus witlout EMS b meniscus with EMS (c mildl of the ekctron aetic stirerwi EMS (d)outlet of the moul with EMS 流动，并降低了向下过高的流速，增强了回流.从搅 (7):972 拌区域垂直中心向下，水平旋转流动的速度逐渐 【3 PesteanuQ SchwedlterK Cantrbut知to the lara您eddy smu lation of flows in e lectxmagnetic stimers for cotinuous casting 变小. IS0mt200343(10):1556 (2)旋转流速随电源电流的增大而提高，同时 4 Meyer JI.Syekely J ELKaddahN Cakculation of the electro 旋转流速随着电源频率的增加而提高 magnetic force fieH fr induction stimring n continuous castng (3)在电磁力作用下钢液旋转流速在水平面上 Trans In Steel Inst Jn 1987.27(1):25 呈单峰值分布，在近壁面处最大. [5 Na mrajanTT Fnie ekment aa psis of electromagnetically dr (4)调整搅拌器的位置可明显改便沿拉坯方向 en fbw in submol stirring of steel billets and slabs Bu ht 199838(7)片680 最大旋转速度，可根据工艺要求对搅拌器的位置进 UeyamaT ShinkuraK Ueda R Fundam enmlequn tions for eddy 行调整. current analysis by using he A method and 3-D anapysis of a canducting liquid IEEE TransMag 1989 25(5):4153 参考文献 [7 Gliere A Masse P AF nite element fnite difference cmpumtion I 1]SPizerK H Dulke M Schwerdtfger K Routinal ekectrmag of magnetic and ubulent flw coupled poblem IEFE Trans ne tic stirring n continuous casting of ound strands Meta ll Trans Mag1988241):252 B198617(1片119 I 8 SPizer KH SchwerdtfgerK Themanetic field of induc prs used [2 LiBK Tsuk hashi F Efect of onting magnetic fied an wa for romatinal stiming n he continuous casting of steel 1&S Phase fow n RH vacuum degassing vessel BIJ ht 2005.45 199017(9片57第 2期 于 洋等:钢连铸电磁搅拌工艺中流场的数值模拟 图 2 水平剖面流场分布.(a) 未施加电磁场时弯月面的流场;( b) 施加电磁场时弯月面的流场;( c) 施加电磁场时搅拌器中心处的流 场;( d) 施加电磁场时出口处的流场 Fig.2 Vectordistributionsoftheflowfieldonx-yhorizontalplanes:( a) meniscuswithoutEMS;( b) meniscuswithEMS;( c) middleofthe electromagneticstirrerwithEMS;( d) outletofthemouldwithEMS 流动, 并降低了向下过高的流速, 增强了回流 .从搅 拌区域垂直中心向下, 水平旋转流动的速度逐渐 变小. ( 2) 旋转流速随电源电流的增大而提高, 同时 旋转流速随着电源频率的增加而提高 . ( 3) 在电磁力作用下钢液旋转流速在水平面上 呈单峰值分布, 在近壁面处最大 . ( 4) 调整搅拌器的位置可明显改便沿拉坯方向 最大旋转速度, 可根据工艺要求对搅拌器的位置进 行调整 . 参 考 文 献 [ 1] SpizerKH, DubkeM, SchwerdtfegerK.Rotationalelectromag￾neticstirringincontinuouscastingofroundstrands.MetallTrans B, 1986, 17( 1 ):119 [ 2] LiBK, TsukihashiF.Effectofrotatingmagneticfieldontwo￾phaseflowinRHvacuumdegassingvessel.ISIJInt, 2005, 45 ( 7 ) :972 [ 3] PesteanuO, SchwerdtfegerK.Contributiontothelargeeddysimu￾lationofflowsinelectromagneticstirrersforcontinuouscasting. ISIJInt, 2003, 43( 10) :1556 [ 4] MeyerJL, SzekelyJ, El-KaddahN.Calculationoftheelectro￾magneticforcefieldforinductionstirringincontinuouscasting. TransIronSteelInstJpn, 1987, 27( 1 ) :25 [ 5] NatarajanTT.Finiteelementanalysisofelectromagneticallydriv￾enflowinsub-moldstirringofsteelbilletsandslabs.ISIJInt, 1998, 38( 7 ):680 [ 6] UeyamaT, ShinkuraK, UedaR.Fundamentalequationsforeddy currentanalysisbyusingtheA-φmethodand3-Danalysisofa conductingliquid.IEEETransMagn, 1989, 25( 5 ):4153 [ 7] GliereA, MasseP.AFiniteelement-finitedifferencecomputation ofmagneticandturbulentflow coupledproblem.IEEE Trans Magn, 1988, 24( 1) :252 [ 8] SpizerKH, SchwerdtfegerK.Themagneticfieldofinductorsused forrotationalstirringinthecontinuouscastingofsteel.I＆ SM, 1990, 17( 9 ):57 · 159·