大方坯连铸结晶器水口优化模拟探究  

Study on the optimization simulation of submerged entry nozzle in mold during bloom continuous casting

作　　者：周晨阳 黄军[1] 张亚竹[1] 王舒皓 张恒 ZHOU Chen-yang;HUANG Jun;ZHANG Ya-zhu;WANG Shu-hao;ZHANG Heng(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongol,China)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《连铸》2023年第1期97-105,共9页Continuous Casting

基　　金：内蒙古自然科学基金资助项目(2019MS05012)。

摘　　要：为了研究不同浸入式水口类型对结晶器内流场流动的影响,以结晶器水口优化为出发点,利用物理模拟和数值模拟两种手段对断面280mm×380mm大方坯结晶器不同水口开展优化研究。本研究首先构建了一个1∶1结晶器水模拟试验装置,实现不同浸入式水口下的连铸流动模拟,利用PIV测量了不同水口下的结晶器截面流场,然后利用Fluent软件进一步研究了浸入式水口开孔角度、开孔数目、安装角度等参数变化对结晶器内流场以及液面波动的影响。物理模拟和数值模拟研究表明,开孔角度向上时,波动范围大于5mm;开孔角度水平时,对窄面冲击速度过大,达到0.35m/s;较双孔水口,四孔水口液面速度为0.22m/s,小于卷渣临界速度值;水口安装角度改为对角线时,强化了内流场角部流动,整个流场流动更加稳定。In order to study the influence of different immersion nozzle types on the flow field in mold,taking the nozzle optimization of mold as the starting point,two methods of physical simulation and numerical simulation were used to carry out the optimization of different nozzle of 280 mm×380 mm large slab mold.In this study,a 1∶1 mold water simulation test device was firstly constructed to simulate continuous casting flow under different submerged entry nozzle.The mold cross section flow field under different nozzle was measured by PIV.Then,Fluent software was used to further study the influence of parameters such as the opening angle,opening number and installation angle on the flow field and liquid level fluctuation in the mold.Physical simulation and numerical simulation show that when the opening angle is upward,the fluctuation range is more than 5 mm;When the opening angle is horizontal,the impact velocity of narrow surface is too large,reaching 0.35 m/s.The liquid level velocity of four-hole nozzle is 0.22 m/s compared with that of double-hole nozzle,which is lower than the critical velocity value of slag coiling.When the nozzle installation angle is changed to diagonal,the flow in the corner of the internal flow field is strengthened and the flow in the whole flow field is more stable.

关 键 词：结晶器 浸入式水口 液面波动 数值模拟 物理模拟 

分 类 号：TF777[冶金工程—钢铁冶金]