表面粗糙度对微尺度火焰淬熄的影响

摘要

在对不锈钢片、铝片、单晶硅以及氧化锆板等材料表面上进行化学和物理的处理,形成不同的表面粗燥度.使用这些不同表面粗糙度的平板制作缝隙燃烧室壁面.在缝隙燃烧器的两个平行板之间.使用预混甲烷/空气火焰进行燃烧实验,考察在微小空间里,表面粗糙度对火焰淬熄的影响.结果显示表面粗糙度的增加,火焰淬熄距离变小,有利于微尺度燃烧器的稳焰.随燃烧室壁的外加热温度的提高,热损失减少,表面粗燥度对火焰淬熄距离的影响越明显.%Slit burner was built with plates of different surface roughness. The effect of the surface roughness on flame quenching in confined space was studied by investigating the combustion between two parallel plates with premixed methanol/air gas. The results showed that the quenching distance decreased with increasing roughness, which is beneficial for increase the flame stability of micro burners.