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A New Approach to Calculate Different Regions' Volume Fraction in Tundish

机译:计算中间包不同区域体积分数的新方法

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So far, there are two widely used approaches to calculate different regions' volume fraction for single-strand tundish, but they are proved to have some limitation. Few people do research about approach of calculating different regions' volume fraction for multi-strand tundish. These will greatly inhibit the development of tundish designing and tundish metallurgy. In this paper, further study about the application of residual time distribution (RTD) concept in tundish metallurgical field is carried on, including the case of single-strand tundish and the case of multi-strand tundish. Then, basing on mathematical simulation, a completely new calculation approach is attempted to propose for the first time, and it is easy to calculate the different regions' volume fraction in tundish. In the new approach, the standard is proposed definitely for dealing with RTD-curve. It is much complete and helpful for the application of RTD concept in metallurgy field. Definition of all regions in tundish flow field are further specified in the new approach, and especially, dead region's definition is made more clear, which concept was always ambiguous for people before, and it can be adaptable to redefine according the actual demand. Newly proposed approach can distinguish different flow patterns sensitively. Especially, new approach is suitable for both of single-strand tundish and multi-strands tundish, but no other approach can do it so far. What's more, new approach has considered the bypass flow, which is critical for tundish metallurgy, and new approach is able to calculate the bypass flow 's volume fraction, and other approach can do it neither. So new approach will be more complete and reasonable to evaluate and improve the tundish designing and tundish metallurgy.
机译:到目前为止,有两种广泛使用的方法来计算单链中间包的不同区域的体积分数,但事实证明它们存在一定的局限性。很少有人研究计算多股中间包不同区域的体积分数的方法。这些将大大抑制中间包设计和中间包冶金学的发展。本文对剩余时间分布(RTD)概念在中间包冶金领域的应用进行了深入研究,包括单股中间包和多股中间包。然后,在数学模拟的基础上,首次尝试提出一种全新的计算方法,并且很容易计算中间包中不同区域的体积分数。在新方法中,绝对提出了用于处理RTD曲线的标准。这对于RTD概念在冶金领域的应用非常完整和有益。新方法进一步确定了中间包流场中所有区域的定义,尤其是对死区的定义更加明确,该概念以前对于人们始终是模棱两可的,可以根据实际需求进行重新定义。新提出的方法可以敏感地区分不同的流型。尤其是,新方法适用于单链中间包和多链中间包,但到目前为止没有其他方法可以做到。而且,新方法考虑了旁路流量,这对于中间包冶金至关重要,新方法能够计算旁路流量的体积分数,而其他方法则不能。因此,新的方法将更加完整和合理地评估和改进中间包设计和中间包冶金。

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