底吹钢包气-钢-渣三相流过程离散-连续转化及联合算法  

Modeling of gas-steel-slag three-phase flow in ladle with discrete-continuum transition and combination

作　　者：李林敏 李宝宽 许昌[1] 胡代清 刘玉成 Li Linmin;Li Baokuan;Xu Chang;Hu Daiqing;Liu Yucheng(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China;School of Metallurgy,Northeastern University,Shenyang 110819,China;Anhui Jinzhai Pumped Storage Power Co.,Ltd,Lu'an 237300,China)

机构地区：[1]河海大学能源与电气学院,南京211100 [2]东北大学冶金学院,沈阳110819 [3]安徽金寨抽水蓄能有限公司,安徽六安237300

出　　处：《材料与冶金学报》2018年第3期182-190,197,共10页Journal of Materials and Metallurgy

基　　金：中国博士后科学基金(2018M630502);江苏省青年基金(BK20180505);中央高校基本科研业务费(2018B01614)

摘　　要：针对底吹钢包内气-钢-渣三相流过程中小尺度离散气泡和较大尺度自由界面共存的问题,本文采用离散气泡模型模拟小尺度气泡,而对较大尺度气泡和渣层的上下表面则采用界面追踪法直接求解,并采用大涡模拟方法以更好地描述其中的非稳态流动规律.同时,建立离散气泡和大尺度连续气体的转化模型,实现离散-连续联合的多尺度多相流数值计算方法.模型可以同时完整地描述大尺度连续界面和小尺度离散气泡的运动行为;较完善地揭示了小尺度离散气泡的合并过程,离散气泡和连续界面的相互作用及聚合过程,大尺度气泡的运动、变形及合并破碎过程,渣层波动、渣滴及渣眼的形成及演变过程等,并对比实验结果验证了模型的可靠性.Aimed at the phenomenon of coexistence of the small scale discrete bubbles with the large scale interfaces for the gas-steel-slag three-phase flow in the bottom blowing ladle,for the small scale bubble,a discrete bubble model was used,and for the large scale bubble and the slag surface,an interface tracking method was applied,while the large eddy simulation was used to describe the unstable flow.An algorithm of discrete-continuum transition between the small and the large bubbles was established to perform a multi-scale simulation of bubbles.By the treatments mentioned above,behavior of the large scale continuous interface and the small scale bubble can be completely revealed.The experimental results verified the reliability of the modeling framework.

关 键 词：底吹钢包 多相流 离散气泡模型 界面追踪法 多尺度算法 

分 类 号：TF769.2[冶金工程—钢铁冶金]