甲烷-氢混合物对相干射流流动和燃烧的影响

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Journal of Iron and Steel Research(International) Pub Date : 2017-11-01 DOI:10.1016/S1006-706X(17)30166-8
Ting Cheng , Kong Zhu , Kai Dong
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引用次数: 2

摘要

相干射流广泛应用于电弧炉炼钢,以提高氧气利用率和化学反应速率。然而,燃气燃烧对射流性能的影响尚未完全了解。利用Fluent软件研究了炼钢温度下相干射流的流动和燃烧特性,并在燃烧反应模型中采用了详细的化学动力学反应机理。通过热态实验测量了超音速射流的轴向速度和总温度。将模拟结果与实验数据以及Ito和Muchi提出的经验射流模型进行了比较,得到了较好的一致性。研究结果表明,通过优化燃气的燃烧效果,可以延长相干射流的潜在核心长度。此外,还研究了超音速射流在亚音速段的行为,因为亚音速段是控制氧枪位置的重要因素。研究表明,相干射流在亚音速段的衰减比常规射流更显著。
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Effect of methane-hydrogen mixtures on flow and combustion of coherent jets

Coherent jets are widely used in electric arc furnace (EAF) steelmaking to increase the oxygen utilization and chemical reaction rates. However, the influence of fuel gas combustion on jet behavior is not fully understood yet. The flow and combustion characteristics of a coherent jet were thus investigated at steelmaking temperature using Fluent software, and a detailed chemical kinetic reaction mechanism was used in the combustion reaction model. The axial velocity and total temperature of the supersonic jet were measured via hot state experiments. The simulation results were compared with the experimental data and the empirical jet model proposed by Ito and Muchi and good consistency was obtained. The research results indicated that the potential core length of the coherent jet can be prolonged by optimizing the combustion effect of the fuel gas. Besides, the behavior of the supersonic jet in the subsonic section was also investigated, as it is an important factor for controlling the position of the oxygen lance. The investigation indicated that the attenuation of the coherent jet is more notable than that of the conventional jet in the subsonic section.

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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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