转炉氧枪超音速射流特性的数值模拟  

Numerical Simulation of Characteristics of Supersonic Jet in BOF

作　　者：李子亮[1] 苍大强[1] 倪松明 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《工业炉》2016年第5期6-10,共5页Industrial Furnace

摘　　要：用Fluent软件对炼钢转炉氧枪在不同工况条件和环境温度下的射流行为进行数值模拟研究。结果表明:出口马赫数、环境温度和出口压力对氧气射流影响显著;氧枪射流超音速核心长度与出口马赫数和环境温度呈正相关,与环境气体压力呈负相关;在设计工况下,回归得到无因次超音速核心长度与出口马赫数的关系方程;非设计工况下,随着出口压力的变化,超音速核心长度与出口压力比(Pe/Pa)呈线性关系。此外,进一步研究了转炉内环境温度变化对超音速射流核心长度的影响,通过引入"引射率"分析了射流在传输过程中对周围气体的引射特性,并得到轴向引射率随出口马赫数和环境温度的变化关系。Numerical simulation study of converter lance jet behavior with CFD software Fluent under different conditions and ambient temperature is carried out. The results indicate that the outlet Mach number, ambient temperature and outlet pressure significantly influence on the supersonic jet behavior. The supersonic core length is positively correlated with the exit Mach number and the ambient temperature, while, it is negatively correlated with the ambient pressure. The regression relationship between dimensionless supersonic core length and exit Mach number on the designed condition are in good agreement with the experimental data in the literature. And the jet behavior under off-design operating conditions shows that supersonic core length and the ratio of the outlet pressure is a linear relationship. The simulation results and experimental results are consistent when the ambient temperature is 298 K, furthermore, the effects of temperature variation in BOF on the jet behavior are researched. In addition, the characteristics of the jet entrainment are analyzed with entrainment rate.

关 键 词：转炉 氧枪 超音速射流 核心长度 数值模拟 

分 类 号：TF341.1[冶金工程—冶金机械及自动化]