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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。
Fluent software was used to simulate the jet behavior of steelmaking oxygen lance under different operating conditions and ambient temperature. The results show that Mach number, ambient temperature and outlet pressure have significant effects on oxygen jet. Oxygen lance jet supersonic core length is positively correlated with outlet Mach number and ambient temperature, and negatively correlated with ambient gas pressure. Under design conditions, regression The relationship between the dimensionless supersonic core length and the exit Mach number is obtained. Under non-design conditions, the supersonic core length is linear with the outlet pressure ratio (Pe / Pa) as the exit pressure changes. In addition, the influence of ambient temperature in the converter on the core length of supersonic jet was further studied. By introducing the “index of refraction”, the injection characteristics of the surrounding gas in the jet were analyzed and the axial index With the exit Mach number and the relationship between the ambient temperature.