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中文摘要：
以水银和氩气作为模拟介质，通过物理模拟研究了高拉速板坯连铸结晶器内电磁制动和水口吹氩耦合作用下的气泡运动和分布行为．采用电阻探针测量了结晶器内气泡的运动和分布情况，分析了磁场、吹氩量等不同工艺参数对气泡占空比、气泡数量和气泡脉冲宽度的影响规律．实验结果表明：在一定的拉速条件下，施加磁场改变了气泡在结晶器内的分布规律，有利于气泡的上浮，降低了气泡在结晶器内的冲击深度，减少了到达结晶器窄面的气泡数量；磁场的施加和吹氩量的增加都使得脉冲宽度较大的气泡数量增多，且主要集中在结晶器1／4宽度和水口之间区域．
英文摘要：
A physical model was developed to study bubble movement and distribution behavior in consideration of the coupled effects of electromagnetic brake （EMBr） and argon gas injection in a slab continuous casting mold with high casting speed. Mercury and argon gas were employed to simulate the molten metal and argon gas two-phase flow. The resistance probe was applied to study the gas bubble statistical behavior in the mold with and without EMBr under different argon gas flow rates. The effects of EMBr and argon gas flow rate on the local void fraction, number and pulse width of gas bubbles were investigated. The results show that when the magnetic field is imposed under a given casting speed, the distribution of gas bubbles in the mold changes, the floating up rate of gas bubbles increases, the penetration depth of gas bubbles becomes lower, and the number of gas bubbles reaching the narrow face of the mold decreases. The number of gas bubbles with wide pulse increases between the 1/4 width of the mold and the nozzle with EMBr or with the argon gas flow rate increasing.
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