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首页> 外文会议>Iron and Steel Technology Conference >Numerical Studies on Molten Steel Flow and Heat Transfer in a Thin-Slab Steel Caster Under Different SEN Designs
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Numerical Studies on Molten Steel Flow and Heat Transfer in a Thin-Slab Steel Caster Under Different SEN Designs

机译：不同森设计下薄板钢铸机中钢水流量和热传递的数值研究

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Occurrence of break-outs (BO) during casting of narrow slabs has been observed to be influenced by the SEN design in one of ArcelorMttaPs thin-slab casters. 3-D computational fluid dynamics (CFD) models are developed to perform both steady-state and transient simulations of molten steel flow and heat transfer in the SEN and in the CSP caster for three four-port SEN designs (type- A, B and C designs). Despite of the similar port size and location among all three SENs under study, two major design differences exist, including a top insert design at SEN entrance and height of the flow divider at the bottom of the SEN. The computational models are validated by water model measurements of SEN port opening velocities. Both water model experiments and numerical simulation results suggest that SEN design with a taller bottom flow divider causes the increase of both mean and variations of the upper port flow rates and the left-right biased flows in the SEN, which leads to large-scale asymmetric flows in the CSP mold region. Transient heat transfer simulations further show that this unstable biased flow in the mold increases the occurrence of "hot spots" near the shell around the funnel-to-flat transition region, which could be responsible for local steel re-melting and break-out as ferrostatic pressure increases.
机译：已经观察到缩小板铸造期间的断裂（BO）的发生，以受森设计在ArcelormTttaps薄板脚轮中的一个中的影响。开发了3-D计算流体动力学（CFD）模型，以在森中的钢水流量和传热中进行稳态和瞬态模拟，以及三个四端口森设计的CSP脚轮（类型 - A，B和B C设计）。尽管在研究中的所有三种感均的港口大小和位置，但存在两个主要的设计差异，包括在森中的森入口和分流器的高度的顶部插入设计。计算模型通过森端口开口速度的水模型测量验证。水模型实验和数值模拟结果表明，具有较高底部流量分流的森设计导致森中的上端口流量和左右偏置流量的平均值和变化的增加，这导致大规模不对称在CSP模具区域中流动。瞬态传热模拟进一步表明，模具中的这种不稳定的偏置流量增加了漏斗到平坦的过渡区域周围壳附近的“热点”的发生，这可能负责本地钢重新熔化和破坏骨质压力增加。

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