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氧气顶吹射流应用在各种炼钢精炼过程中,是精炼过程的重要因素。人们对常压下的射流行为进行过大量的研究,但对真空精炼过程中减压条件下的射流行为了解不多。通过测量射流的动压研究减压条件下的射流行为,采用大量射流数值模型具体解释射流行为。对比模拟结果与实验数据得出结论,数值模拟方法有效。数学模型模拟了射流行为,详细说明了环境压力对射流行为的影响。当环境压力减小时,射流速度核心区延长,说明在减压条件下,射流衰减程度较常压下的小。采用该模型还可以解释喷口形状对RH实际顶吹过程中二次燃烧行为的影响。
Oxygen top jet applied in a variety of steel refining process, the refining process is an important factor. There has been a great deal of research on jet behavior at atmospheric pressure, but little is known about jet behavior under reduced pressure during vacuum refining. By measuring the dynamic pressure of the jet to study the jet behavior under the reduced pressure, a large number of jet numerical models are used to explain the jet behavior. Comparing the simulation results with the experimental data, the numerical simulation method is effective. The mathematical model simulates the jet behavior, detailing the effect of ambient pressure on jet behavior. When the ambient pressure decreases, the jet core velocity increases, indicating that under reduced pressure, jet attenuation is less than atmospheric pressure. This model can also be used to explain the influence of the nozzle shape on the secondary combustion behavior during RH top-blowing.