连铸结晶器方波电流电磁搅拌电磁场-流场数值模拟
|
摘要
采用ANSYS三维有限元数值模拟技术,在320 mm×320 mm方坯连铸结晶器电磁搅拌过程中,对比研究了搅拌器加载方波电流和正弦波电流对铸坯内部电磁场、电磁力及流场的影响。结果表明,在其他参数相同条件下,搅拌器加载方波电流时,铸坯内部也可以产生旋转磁场,且磁场分布较加载正弦波电流更大;同时,产生促使钢液旋转的电磁力,且电磁力峰值较大,表现为一种震荡力效果,而加载正弦波电流产生电磁力相对平稳。加载方波电流对铸坯内部将产生逆时针旋转流场,且有震荡效果,更有助于提高搅拌效率。
The influence of square wave current and sinusoidal wave current loaded by the agitator on the electromagnetic field, electromagnetic force and flow field in the continuous casting mould of 320 mm×320 mm billet was studied by ANSYS three-dimensional finite element numerical simulation. The results show that under the same condition of other parameters, when the stirrer loads the square wave current, the rotating magnetic field can also be generated inside the billet, and the magnetic field distribution is larger than that of the sine wave current. At the same time, the electromagnetic force that causes the liquid steel to rotate is generated, and the peak value of the electromagnetic force is large, showing a kind of shock force effect, while the electromagnetic force generated by loading the sine wave current is relatively stable.The loading of square wave current will produce counterclockwise rotating flow field inside the billet, and the effect of vibration is more conducive to improving the stirring efficiency.
The influence of square wave current and sinusoidal wave current loaded by the agitator on the electromagnetic field, electromagnetic force and flow field in the continuous casting mould of 320 mm×320 mm billet was studied by ANSYS three-dimensional finite element numerical simulation. The results show that under the same condition of other parameters, when the stirrer loads the square wave current, the rotating magnetic field can also be generated inside the billet, and the magnetic field distribution is larger than that of the sine wave current. At the same time, the electromagnetic force that causes the liquid steel to rotate is generated, and the peak value of the electromagnetic force is large, showing a kind of shock force effect, while the electromagnetic force generated by loading the sine wave current is relatively stable.The loading of square wave current will produce counterclockwise rotating flow field inside the billet, and the effect of vibration is more conducive to improving the stirring efficiency.
引文
[1]陈荣,沈厚发.板坯结晶器电磁搅拌电磁场与流场的数值模拟[J].连铸,2010(3):1-5.
[2]易军.基于旋转磁场、行波磁场电磁搅拌器的数值模拟[D].包头:内蒙古科技大学,2014.
[3]李建超,吉利宏,王宝峰.方坯连铸结晶器电磁搅拌磁场与流场数值模拟[J].铸造技术,2010,31(11):1468-1472.
[4]陈国军.低频脉冲磁场金属凝固晶粒细化机理研究[D].沈阳:东北大学,2015.
[5]Jung-Eui LEE,Heung Nam HAN,Kyu Hwan OH,et al.A fully coupled analysis of fluid flow,heat transfer and stress in continuous round billet casting[J].ISIJ International,1999,39(5):435-444.
[6]魏宁,包燕平,吴华杰,等.大方坯连铸结晶器电磁搅拌三维电磁场的数值模拟[J].北京科技大学学报,2011,33(6):702-708.
[7]任兵芝,朱苗勇,王宏丹,等.大方坯连铸结晶器电磁搅拌三维电磁场与流场的数值模拟[J].金属学报,2008,44(4):507-512.
[8]陈永,朱苗勇,蔡可森,等.280 mm×380 mm方坯连铸结晶器电磁搅拌数值模拟[J].钢铁钒钛,2008,29(2):43-49.
[9]张静,王恩刚,邓安元,等.大方坯结晶器电磁搅拌磁场流场耦合数值模拟[J].铸造,2011,60(5):469-472.
[10]丁国,李建超,王宝峰,等.小方坯连铸结晶器电磁搅拌磁场和流场的耦合分析[J].包头钢铁学院学报,2006(25):222-225.
[2]易军.基于旋转磁场、行波磁场电磁搅拌器的数值模拟[D].包头:内蒙古科技大学,2014.
[3]李建超,吉利宏,王宝峰.方坯连铸结晶器电磁搅拌磁场与流场数值模拟[J].铸造技术,2010,31(11):1468-1472.
[4]陈国军.低频脉冲磁场金属凝固晶粒细化机理研究[D].沈阳:东北大学,2015.
[5]Jung-Eui LEE,Heung Nam HAN,Kyu Hwan OH,et al.A fully coupled analysis of fluid flow,heat transfer and stress in continuous round billet casting[J].ISIJ International,1999,39(5):435-444.
[6]魏宁,包燕平,吴华杰,等.大方坯连铸结晶器电磁搅拌三维电磁场的数值模拟[J].北京科技大学学报,2011,33(6):702-708.
[7]任兵芝,朱苗勇,王宏丹,等.大方坯连铸结晶器电磁搅拌三维电磁场与流场的数值模拟[J].金属学报,2008,44(4):507-512.
[8]陈永,朱苗勇,蔡可森,等.280 mm×380 mm方坯连铸结晶器电磁搅拌数值模拟[J].钢铁钒钛,2008,29(2):43-49.
[9]张静,王恩刚,邓安元,等.大方坯结晶器电磁搅拌磁场流场耦合数值模拟[J].铸造,2011,60(5):469-472.
[10]丁国,李建超,王宝峰,等.小方坯连铸结晶器电磁搅拌磁场和流场的耦合分析[J].包头钢铁学院学报,2006(25):222-225.