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首页> 外文期刊>Applied Energy >Combustion characteristics of premixed propane/hydrogen/air in the micro-planar combustor with different channel-heights
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Combustion characteristics of premixed propane/hydrogen/air in the micro-planar combustor with different channel-heights

机译：不同通道高度的微平面燃烧器中丙烷/氢气/空气的混合燃烧特性

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In order to improve the working performance and fuel adaptability of the micro-combustor, micro-planar combustors with different channel-heights are fabricated, and the three-dimensional calculation model is also built so as to study the basic characteristics of the blended propane/hydrogen combustion process. It is found that the hydrogen-addition method can overcome the shortcomings of propane flame instability under micro-scale conditions. When a small amount of hydrogen is added, the flame location could be fixed due to the stimulation of the important free radical like OH, thus obviously bringing the increase of mixture flammability range. The hydrogen-enriched fuel can further reduce the minimum flammable channel-height of propane. When the hydrogen addition ratio reaches 20%, a stable combustion will be achieved even in 1.5 mm channel-height micro-combustor. Regardless of the 2.0 mm or 2.5 mm channel-height combustor, the effect of hydrogen addition will be better, and the flame location moves upstream gradually with the increase of hydrogen fraction. From the view of chemical energy utilization, the 2.0 mm height combustor will be more suitable in the blended-fuel combustion mode, which is owing to the significant growth of the radiant energy output from the external wall. (C) 2017 Published by Elsevier Ltd.
机译：为了提高微型燃烧器的工作性能和燃料适应性，制造了具有不同通道高度的微型平面燃烧器，并建立了三维计算模型，以研究丙烷/混合丙烷的基本特性。氢燃烧过程。发现加氢方法可以克服丙烷在微观条件下火焰不稳定的缺点。当添加少量的氢时，由于像OH这样的重要自由基的刺激，火焰的位置可以固定，从而明显地增加了混合物的可燃范围。富氢燃料可以进一步降低丙烷的最小易燃通道高度。当氢添加率达到20％时，即使在通道高度为1.5mm的微型燃烧器中也可以实现稳定的燃烧。不管通道高度为2.0 mm或2.5 mm的燃烧器，加氢的效果都会更好，并且火焰位置会随着氢气分数的增加而逐渐向上游移动。从化学能利用的角度来看，高度为2.0 mm的燃烧器将更适合混合燃料燃烧模式，这是由于从外壁输出的辐射能显着增加。 （C）2017由Elsevier Ltd.发布

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