东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (4): 505-509.DOI: 10.12068/j.issn.1005-3026.2019.04.010

• 材料与冶金 • 上一篇    下一篇

火焰清理工艺中平行多孔射流非预混燃烧的研究

李一明1,2， 李宝宽1， 齐凤升1   

  1. (1. 东北大学 冶金学院， 辽宁 沈阳110819; 2. 沈阳农业大学 工程学院， 辽宁 沈阳110866)
  • 收稿日期:2018-02-01 修回日期:2018-02-01 出版日期:2019-04-15 发布日期:2019-04-26
  • 通讯作者: 李一明
  • 作者简介:李一明(1989-)，男，辽宁辽中人，东北大学博士研究生; 李宝宽(1963-)，男，辽宁辽阳人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51574068).

Non-premixed Combustion of Parallel Multiple Jets in Scarfing Process

LI Yi-ming1,2， LI Bao-kuan1， QI Feng-sheng1   

  1. 1. School of Metallurgy， Northeastern University， Shenyang 110819， China; 2. School of Engineering， Shenyang Agricultural University，Shenyang 110866， China.
  • Received:2018-02-01 Revised:2018-02-01 Online:2019-04-15 Published:2019-04-26
  • Contact: LI Bao-kuan
  • About author:-
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摘要： 建立了远程控制燃烧试验台，研究了天然气和氧气的非预混燃烧过程，利用间接测温法分析了多孔射流燃烧火焰的温度分布规律.利用Realizable k-ε湍流模型研究平行多孔射流的流场特性，采用平衡化学反应模型研究射流的非预混燃烧过程，数值计算得出的火焰结果与试验数据吻合较好.结果表明:多孔射流的卷吸与合并能够加快气体的混合与燃烧;平行分布的45股射流在喷嘴出口附近趋于形成双孔合并，随着流动发展会发生再合并，最终表现为3股强射流火焰形态.

关键词: 多孔射流, 非预混燃烧, 射流合并, 火焰清理, 数值模拟

Abstract: A remote-controlled combustion test bench was set up to investigate the non-premixed combustion process of natural gas and oxygen， and the temperature distribution of multiple jets combustion flame was analyzed by the indirect temperature measurement. The Realizable k-ε turbulence model was used to study the flow field characteristics of parallel multiple jets， and the equilibrium chemical reaction model was used to study the non-premixed combustion process of jet. The numerical results have good agreement with those from the experiments. The results indicateed that the entraining and merging behaviors of multiple jets could promote the combustion action. The parallel 45 jets tend to form dual-jet combinations near the nozzle exit. Interactions and re-combinations of the jets could take place during further flowing and eventually form 3 strong flames in the downstream.

Key words: multiple jets, non-premixed combustion, jet merging, scarfing, numerical simulation

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