环境温度对转炉顶吹氧枪射流特性的影响  

Effect of Ambient Temperature on Characteristics of Jets from Oxygen Lance in BOF Steelmaking

作　　者：李明明[1] 李琳[1] 李强[1] 邹宗树[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2014年第10期1437-1441,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51104037);中央高校基本科研业务费专项资金资助项目(N120402010)

摘　　要：联合标准的k-ω湍流模型和雷诺平均的N-S方程,建立了转炉多喷孔氧枪超音速射流可压缩、非等温过程的三维CFD模型,模型的有效性通过实验进行了验证.考察了温度对气体分子黏度的影响,研究了不同温度场下射流动力学特性.结果表明:环境温度对射流速度、密度及温度分布有较大影响,环境温度越高,射流密度越小,速度衰减越慢,速度越大,并且射流径向扩张越厉害;温度越低,射流越易于聚并.随着射流的轴向流动,温度场对射流动压的影响逐渐减小,即射流对熔池的冲击力受环境温度影响减弱,但冲击面积随温度的提高而增大.Combining the standard k -ω model with the Reynolds averaged Navier-Stokes （RANS） equations, a compressible, non-isothermal and three-dimensional CFD model was developed for the multiple nozzle supersonic jets in top-blown steelmaking convertor, and the validity of the model was verified by experiment. The effect of temperature field on molecule viscosity of fluid was considered, and the dynamic properties of jets were studied in different temperature fields. The results showed that ambient temperature makes a great influence on jets velocity, temperature and density distributions. With the increase of ambient temperature, the jets density decreases, their velocity attenuation is slower, velocity is higher and radial expanding of jets is much easier. Jet is more likely to coalescence in lower ambient temperature. As jets travel in axial direction, the effect of ambient temperature on jets dynamic pressure tends to negligible. That is to say, the effect of the ambient temperature on the impacting force of jets on the bath is weakened, but impinging area increases with the increase of ambient temperature.

关 键 词：射流 射流聚并 环境温度 转炉吹炼 CFD 

分 类 号：TF713[冶金工程—钢铁冶金]