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Ladle Shrouds as Flow Control Devices for Tundish Operations.

机译:钢包罩作为中间包操作的流量控制设备。

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摘要

The performance characteristics of a tundish, such as the flotation of inclusions and of slag entrainment, are largely influenced by the fluid flow phenomena. Physical and mathematical modeling in water is widely used to understand fluid flows in a tundish, and as a tool to improve, control and design procedures for high quality steel processing operations.;Different cases have been analyzed, including a conventional ladle shroud (LS) with a bare tundish, and a tundish furnished with an impact pad. Similarly, the new design of the shroud (DLS) was studied under equivalent conditions. The physical experiments included the use of Particle Image Velocimetry (PIV) and conductivity tracer techniques. The PIV measured the instantaneous velocities at the outlet of the DLS and the LS at different flow rates, showing the detailed jetting characteristics of water leaving the two types of ladle shroud.;Residence Time Distribution (RTD) curves were also obtained for the different flow arrangements previously mentioned, and the dispersion of a colored dye tracer was observed at different intervals of time during tundish operation, and analyzed using the video visualization technique.;These approaches were used to study the performance of fluid flow for a new design of ladle shroud. The new "Dissipative Ladle Shroud" (DLS) was studied, using a one third scale, delta shaped, four-strand tundish. The results were compared with those achieved with the standard ladle shroud. The standard k-epsilon turbulence model, together with the continuity and momentum equations, were employed in order to analyze, and visualize, the velocity fields generated within the tundish operating at steady state.
机译:中间包的性能特征,例如夹杂物的浮选和夹渣的形成,在很大程度上受流体流动现象的影响。水中的物理和数学建模被广泛用于理解中间包中的流体流动,并作为改善,控制和设计程序以进行高质量钢加工操作的工具。已分析了多种情况,包括传统的钢包导流罩(LS)中间包是裸露的,中间包装有防撞垫。同样,在等效条件下研究了护罩(DLS)的新设计。物理实验包括使用粒子图像测速(PIV)和电导率示踪技术。 PIV在不同流速下测量了DLS和LS出口处的瞬时速度,显示了离开两种类型的钢水包罩的水的详细喷射特性;还获得了不同流量的停留时间分布(RTD)曲线前面提到的布置,并且在中间包操作期间的不同时间间隔观察了有色染料示踪剂的分散,并使用视频可视化技术进行了分析。;这些方法用于研究新型钢包套的流体流动性能。研究了新的“耗散钢包导流罩”(DLS),它使用的是三分之一比例,三角形,四股中间包。将结果与使用标准钢包导流罩获得的结果进行比较。使用标准的kε湍流模型,以及连续性和动量方程,以分析和可视化在稳定状态下运行的中间包内产生的速度场。

著录项

  • 作者

    Morales Higa, Ken.;

  • 作者单位

    McGill University (Canada).;

  • 授予单位 McGill University (Canada).;
  • 学科 Engineering Mechanical.
  • 学位 M.Eng.
  • 年度 2011
  • 页码 133 p.
  • 总页数 133
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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