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首页> 外文期刊>ISIJ international >Effect of Double Ruler Magnetic Field in Controlling Meniscus Flow and Turbulence Intensity Distribution in Continuous Slab Casting Mold
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Effect of Double Ruler Magnetic Field in Controlling Meniscus Flow and Turbulence Intensity Distribution in Continuous Slab Casting Mold

机译：双尺磁场对连铸板坯弯月面流动和湍流强度分布的影响

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摘要

To find the effect of double ruler electromagnetic breaking (EMBr) in continuous casting flow control (FC) mold, present investigation aims at developing a validated transient magnetohydrodynamic (MHD) flow and turbulence model for the FC mold caster of the Tata Steel plant. Towards the above, the mathematical model firstly validated with the online plant measurement data and found to be in good agreement. Based on the plant measurement of magnetic fields at various EMBr ruler current settings, simulations are carried out for different casting speeds and section sizes. Heavy meniscus flow instabilities during EMBr OFF conditions are found to be suppressed through the retarding influence of applied magnetic field. The effect of EMBr causes thinning of the velocity boundary layer and the flow is found more prone to be surface directed. In the mold, magnetic field dampens turbulence and emboldens the formation of large scale vertical structures, whose axis is aligning with the magnetic field vector. The jet hitting the narrow wall becomes more focused and reduced lateral dispersion during EMBr ON condition. Change in EMBr ruler positions leading to a shallower downward jet angle and higher surface velocity.
机译：为了发现双尺电磁断裂（EMBr）在连铸流控（FC）模具中的作用，本研究旨在为塔塔钢铁厂的FC铸模脚建立经过验证的瞬变磁流体动力学（MHD）流动和湍流模型。综上所述，该数学模型首先通过在线工厂测量数据进行了验证，发现具有很好的一致性。基于在各种EMBr直尺电流设置下的磁场工厂测量结果，对不同的铸造速度和截面尺寸进行了仿真。发现通过施加磁场的延迟影响可以抑制EMBr OFF条件下的严重弯月面流动不稳定性。 EMBr的作用导致速度边界层变薄，并且发现流动更倾向于表面定向。在模具中，磁场可抑制湍流并增强大型垂直结构的形成，该垂直结构的轴与磁场矢量对齐。在EMBr ON条件下，撞击窄壁的射流变得更加集中，并减少了侧向分散。 EMBr标尺位置的变化导致更小的向下喷射角和更高的表面速度。

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