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首页> 外文期刊>ISIJ international >Flow Dynamics in Thin Slab Molds Driven by Sustainable Oscillating Jets from the Feeding SEN
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Flow Dynamics in Thin Slab Molds Driven by Sustainable Oscillating Jets from the Feeding SEN

机译：进料SEN的可持续振荡射流驱动的薄板坯模具的流动动力学。

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摘要

Sustainable oscillations of discharging jets from a two-port SEN in a thin slab caster were studied using various experimental water-modeling techniques and mathematical simulations via a combination of Reynolds Stress Model and Volume of Fluid Model to follow interface dynamics of liquid phase. A dynamic distortion of low frequency was observed on fluid flow. This distortion enhances the permanent oscillations of discharging jets and finally produces large gradients of Reynolds stresses at their boundaries with the surrounding flow. Thus high strain stresses derive into large gradients of dissipation rates of kinetic energy through the jets giving place to large and small eddies which transport energy to the free bath surface and refine the flow structure located below the tip of the SEN, respectively. As a final result non-symmetric flows with high meniscus instability are produced independently of casting speed and mold size. These results are a bottom line reference to design future SEN's for thin slab casters with improved performances.
机译：利用各种实验水建模技术和数学模型，通过结合雷诺应力模型和流体模型体积，跟随液相界面动力学，研究了薄板坯连铸机中两口SEN的喷射流的可持续振荡。在流体流动上观察到低频的动态失真。这种变形会增强喷流的永久振动，并最终在与周围流的边界处产生大的雷诺应力梯度。因此，高应变应力通过射流产生动能耗散率的大梯度，从而产生大涡旋和小涡旋，大涡旋和小涡旋将能量传输到自由浴表面并分别细化位于SEN尖端下方的流动结构。最终结果是，与浇铸速度和铸型尺寸无关，产生了具有高弯月面不稳定性的非对称流动。这些结果是为性能改进的薄板坯连铸机设计未来SEN的底线参考。

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