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Counter-rotating dual-stage swirling combustion characteristics of hydrogen and carbon monoxide at constant fuel flow rate
International Journal of Hydrogen Energy ( IF 7.2 ) Pub Date : 2020-01-14 , DOI: 10.1016/j.ijhydene.2019.12.068
Qinghua Zeng , Dong Zheng , Yixiang Yuan

In this paper, experimental and numerical methods were used to study the combustion characteristics of a counter-rotating double-stage swirling syngas combustor at constant fuel flow rate, and the effect on it of hydrogen content of syngas. In the experiment, the speed and temperature in the combustor were respectively obtained with PIV and temperature rake, while Reynolds stress equation model and the detailed chemical reaction mechanism of syngas were adopted in the numerical method. The calculation results were in good agreement with the experimental data. Research results indicated that in the working conditions of different hydrogen contents, the flow field structures in the combustor are almost the same, and the maximum temperatures at the outlet remain almost the same. However, as hydrogen content in the fuel increases, the axial velocity in the central area of flow field is increasing, and the outlet temperature distribution coefficient decreases first and then increases. In addition, it was also found in the study that the distribution structure of temperature on the central section of the combustor is almost impervious to the changes in hydrogen content, but with numerical differences, i.e. the higher hydrogen content in the fuel, the farther the stabilization position of flames in the central area is away from the head. It was also indicated in the study that the conventional combustor is no longer applicable to the combustion of syngas, especially the hydrogen-rich fuel. And the work provided the improvement scheme of hydrogen-containing fuel for gas turbine combustor.



中文翻译:

恒定燃料流量下氢气和一氧化碳的反向旋转双级涡旋燃烧特性

本文采用实验和数值方法研究了反向旋转的二级涡旋合成气燃烧器在恒定燃料流量下的燃烧特性,以及对合成气氢含量的影响。在实验中,燃烧室的速度和温度分别通过PIV和温度耙得到,而雷诺应力方程模型和详细的合成气化学反应机理在数值方法中得到了应用。计算结果与实验数据吻合良好。研究结果表明,在不同氢含量的工作条件下,燃烧室的流场结构几乎相同,出口的最高温度几乎保持不变。但是,随着燃料中氢含量的增加,流场中心区域的轴向速度增大,出口温度分布系数先减小后增大。此外,在研究中还发现,燃烧器中央部分的温度分布结构几乎不受氢含量变化的影响,但存在数值差异,即燃料中的氢含量越高,燃烧距离越远。火焰在中央区域的稳定位置远离头部。该研究还表明,常规燃烧器不再适用于合成气,特别是富氢燃料的燃烧。并为燃气轮机燃烧室的含氢燃料提供了改进方案。出口温度分布系数先减小后增大。此外,在研究中还发现,燃烧器中央部分的温度分布结构几乎不受氢含量变化的影响,但存在数值差异,即燃料中的氢含量越高,燃烧距离越远。火焰在中央区域的稳定位置远离头部。该研究还表明,常规燃烧器不再适用于合成气,特别是富氢燃料的燃烧。并为燃气轮机燃烧室的含氢燃料提供了改进方案。出口温度分布系数先减小后增大。此外,在研究中还发现,燃烧器中央部分的温度分布结构几乎不受氢含量变化的影响,但存在数值差异,即燃料中的氢含量越高,燃烧距离越远。火焰在中央区域的稳定位置远离头部。该研究还表明,常规燃烧器不再适用于合成气,特别是富氢燃料的燃烧。并为燃气轮机燃烧室的含氢燃料提供了改进方案。在研究中还发现,燃烧器中央部分的温度分布结构几乎不受氢含量变化的影响,但存在数值差异,即燃料中氢含量越高,稳定位置越远。中心区域的火焰远离头部。该研究还表明,常规燃烧器不再适用于合成气,特别是富氢燃料的燃烧。并为燃气轮机燃烧室的含氢燃料提供了改进方案。在研究中还发现,燃烧器中央部分的温度分布结构几乎不受氢含量变化的影响,但存在数值差异,即燃料中氢含量越高,稳定位置越远。中心区域的火焰远离头部。该研究还表明,常规燃烧器不再适用于合成气,特别是富氢燃料的燃烧。并为燃气轮机燃烧室的含氢燃料提供了改进方案。该研究还表明,常规燃烧器不再适用于合成气,特别是富氢燃料的燃烧。并为燃气轮机燃烧室的含氢燃料提供了改进方案。该研究还表明,常规燃烧器不再适用于合成气,特别是富氢燃料的燃烧。并提供了燃气轮机燃烧室含氢燃料的改进方案。

更新日期:2020-01-15
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