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超音速氧气射流技术是炼钢精炼过程中的重要环节,关于常压条件下超音速氧气射流的特性已进行了大量的研究,但对真空精炼过程中低压环境下的超音速氧气射流特性目前研究较少。通过数值模拟的方法研究了不同环境压力条件下超音速氧气射流的特性,并与试验结果进行了对比分析。研究结果表明:低压环境条件与高压环境条件相比,超音速氧气射流速度的衰减受到抑制,射流核心段的长度得到延长;不同环境压力条件下,射流压力与射流速度分布趋势一致,均沿轴向不断降低,但压力衰减程度大于速度衰减的程度;不同环境压力条件下,氧气射流的温度随着氧气射流的扩散不断升高,最终趋于环境温度。
Supersonic oxygen jet technology is an important step in the refining process of steelmaking. There have been a lot of studies on the characteristics of supersonic oxygen jets under atmospheric pressure. However, the research on the characteristics of supersonic oxygen jet in vacuum environment during vacuum refining less. The characteristics of supersonic oxygen jet under different ambient pressures were studied by numerical simulation and compared with the experimental results. The results show that the attenuation of the supersonic oxygen jet velocity is suppressed and the length of the jet core segment is prolonged compared with the high-pressure environmental conditions. The distribution of the jet pressure and the jet velocity has the same trend under different environmental pressures, The pressure decay degree is greater than the degree of speed decay; under different ambient pressure conditions, the temperature of the oxygen jet increases with the diffusion of the oxygen jet finally reaching the ambient temperature.