用Hg模拟了高速板坯电磁制动结晶器内钢液的流动, 使用超声波Doppler测速仪测量了结晶器内液体的流速和液面的波动, 分析了静磁场对流体流动的作用, 研究了静磁场对浸入式水口出流、结晶器内金属液流动、液面波动、液面流动及对器壁冲刷强度的影响. 结果表明: 静磁场使浸入式水口出流受到抑制, 上部环流区的流动增强, 下部环流区流动减弱; 改善了自由液面的波动和流动. 静磁场不仅具有制动钢液流的作用, 还具有改变流动方向, 分配钢液流量的作用. 磁感应强度大于0.29 T时, 更有利于改善结晶器内的流动.
The flow patterns were simulated by Hg in high speed continuous casting mold with electromagnetic brake. The velocity in mold and fluctuation of meniscus was measured by ultrasonic doppler velocity. The effect of the magnetic field on the fluid flow was analyzed. The influence of magnetic flux density and location on the flow discharged from the nozzle, the velocity in mold, the fluctuation and flow of the meniscus, and the washing intensity of flow were studied. The results showed that the flow discharged from the nozzle was suppressed, the flow in the upper eddy was strengthened, the flow in the lower eddy was weakened, and the fluctuation of free surface and the flow at the meniscus were improved. The magnetic field could not only damp flow, but also change the flow direction and redistribute the flux of liquid steel. When Bmax was higher than 0.29 T, it was beneficial to optimizing and controling the flow in the mold.
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