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The effect of embedded high thermal conductivity material on combustion performance of catalytic micro combustor

机译：嵌入式高导热材料对催化微燃烧器燃烧性能的影响

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摘要

A novel micro combustor embedded with high thermal conductivity material has been proposed for micro-thermophotovoltaic system application. The effect of the materials, which is graphite and nickel with widths 1 mm and 3 mm on the thermal and radiant performance of the new micro combustor, was experimentally and numerically investigated. It was found that high and uniform temperature distribution along the walls of the combustor was obtained by embedding graphite with width of 1 mm because of the enhanced heat transfer, which is desirable for the micro-thermophotovoltaic system. The available radiation energy increased from 4.6 W for the conventional combustor to 5.2 W for the novel combustor when the inlet velocity was 1.0 m/s and the hydrogen/oxygen equivalence ratio was 0.5 under the experimental conditions. The available radiation efficiency increased from 8.9% to 9.8% and the effect of the embedded material could be enhanced by increasing the chemical energy input. Based on the combustor and fuel in this study, the conditions for good thermal performance are graphite with width of 1 mm, inlet velocity of 1.0 m/s and 0.5 equivalence ratio of hydrogen/oxygen by considering the reliability and durability of the combustor.
机译：已经提出了一种嵌入有高导热率材料的新型微型燃烧器，用于微型热光电系统。实验和数值研究了材料（宽度为1 mm和3 mm的石墨和镍）对新型微型燃烧器的热和辐射性能的影响。已经发现，由于增强的热传递，通过嵌入宽度为1mm的石墨而获得沿着燃烧器的壁的高且均匀的温度分布，这对于微热光伏系统是期望的。在实验条件下，当入口速度为1.0 m / s且氢/氧当量比为0.5时，可用辐射能从常规燃烧器的4.6 W增加到新型燃烧器的5.2W。可用辐射效率从8.9％增加到9.8％，并且可以通过增加化学能输入来增强嵌入材料的效果。基于燃烧器和燃料的研究，考虑到燃烧器的可靠性和耐用性，具有良好热性能的条件是宽度为1 mm的石墨，入口速度为1.0 m / s和氢/氧的当量比为0.5。

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