中间包内非等温流现象研究

Study on the formation of non-isothermal flow in a CC tundish

摘要: 在专门设计的二维模型上对非等温流现象的形成条件进行了实验研究,定义了衡量非等温流动出现的准数,并给出了临界值,以用来判断中间包内温度差对钢水流动的影响程度．对中间包非等温流动的形成过程进行了数值模拟,并在40t中间包上做了生产现场的直接测量．结果表明,在正常生产条件下,中间包内流体流动是一个典型的非等温过程．

Abstract: The formation of non-isothermal flow in a tundish was investigated in a special designed 2D water modelling system. The critical condition of the formation of non-isothermal flow was proposed to be a number Zb evaluating the sensitivity of tundish flow to temperature difference. CFD simulation of the tracing pattern in a water model described in the initial formation condition of non-isothermal flow. A direct measurement of temperature stratification in a 40 t tundish confirmed the existence of the non-isothermal flow.