数值模拟了在电磁制动作用下结晶器内金属液的流动行为，并研究了诸如磁感应强度，水口出口角度和磁场位置等各种操作条件对电磁制动效果的影响。数值模拟结果表明：应用电磁制动使结晶器内的流场有很大的改变。施加0.5 T的磁场使结晶器内金属液的表面流速最小，这一计算结果与实验结果十分吻合。为此，应用磁场对结晶器内的流场进行控制，有必要在一定的浇注条件下优化磁感应强度的大小。当磁感应强度、拉坯速度和水口出口角度一定时，磁场位置与水口浸入深度之比有一最佳值，可达到理想的电磁制动效果。
The numerical simulation study for the fluid flow in a slab caster mold with electromagnetic brake (EMBR) is described. The influence of operation conditions, such as magnetic flux density, port angles of nozzle and position of magnetic field, on electromagnetic braking were simulated. The numerical results show that flow field in the mold is changed largely with EMBR. And the surface velocity of molten metal in the mold was minimal at a magnetic flux density of 0.5 T, it agreed well with measured surface level fluctuations in water modeling. So it is necessary to optimize the magnetic flux density for certain casting conditions. When the magnetic flux density, the casting speed and the port angles of nozzle are certain, there is an optimal ratio of the location of magnetic field to the immersion depth of nozzle. With such optimal ratio, the effect of electromagnetic brake is the best.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%