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A numerical study on the effects of hydrogen addition levels, wall thermal conductivity and inlet velocity on methane/air pre-mixed flame in a micro reactor

机译：氢添加量，壁热导率和入口速度对微型反应器中甲烷/空气预混火焰影响的数值研究

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In this study, the effect of the levels of hydrogen addition to methane-air premixed flame in a micro-stepped reactor has been studied numerically. In addition, the effects of mixture velocity and walls’ thermal conductivity (Kw) on the flame’s location, temperature, and species distribution in a micro reactor were calculated using a 2D numerical laminar steady code. The results showed that an increasing level of hydrogen in the methane-air mixture probably improves the combustion process in a micro reactor by intensifying the flame speed, adiabatic flame temperature and the generation of some crucial species (such as OH, H, HCO, HO2, and H2O2). Further, it was found that the addition of hydrogen to methane can shift the flame towards the inlet. In this way, it probably guarantees the flame’s presence in certain conditions compared to cases of no hydrogen addition. In conclusion, it is shown that the temperature distribution along the axis and the wall of the micro reactor can be dependent on the amounts of hydrogen added to the methane-air mixture.
机译：在这项研究中，数值研究了氢气在微型步进反应器中加入甲烷-空气预混火焰的影响。此外，还使用2D数值层流稳定代码计算了混合速度和壁的导热系数（Kw）对火焰在微型反应器中的位置，温度和物质分布的影响。结果表明，甲烷-空气混合物中氢气含量的增加可能会通过提高火焰速度，绝热火焰温度和某些关键物质（例如OH，H，HCO，HO2的产生）来改善微型反应器的燃烧过程。和H2O2）。此外，发现向甲烷中添加氢可以使火焰移向入口。这样，与不添加氢气的情况相比，它可以保证在某些条件下火焰的存在。总而言之，表明沿微型反应器的轴和壁的温度分布可以取决于添加到甲烷-空气混合物中的氢的量。

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