结晶器内液面波动会影响连铸坯的质量，施加电磁搅拌使钢液的液面呈旋转抛物面。电磁搅拌电流过大或拉速过高会造成保护渣卷渣现象，对铸坯质量造成不利的影响。以某钢厂?250 mm连铸圆坯结晶器电磁搅拌为研究对象，采用电磁-流体单相耦合的方式及流体体积函数VOF模型，建立描述结晶器电磁搅拌作用下液面波动的数学模型，研究电磁搅拌作用下浸入式水口深度对液面波动的影响。研究表明，通过增大水口深度，能够改善因电磁搅拌强度过大或拉速过大造成的卷渣现象，减小水口附近的液面波动。
Billet quality is affected by the molten steel level behavior in mold. The molten steel level is a rotating para-bolic surface with electromagnetic stirring. The liquid level fluctuation near the outlet of nozzle will be increased with the growing stirring intensity and casting speed,which can cause the slag entrapment to happen. Based on the parame-ters of ?250 mm round billet continuous casting with mold electromagnetic stirrer in a steel plant,the combined meth-od of turbulence model and multiphase-flow model(VOF) was adopted to establish the mathematical model and study the influence of nozzle submerged depth on the liquid level fluctuation in the mold with electromagnetic stirring. The re-sults show that:increasing the submerged depth of nozzle can decrease the slag entrapment,which was caused by large current intensity and large casting speed.
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