An experimental study on the length and structure of a diffusion flame at packing bed surface
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论文类型：会议论文
发表时间：2015-07-19
收录刊物：EI、Scopus
摘要：Experimental investigations on axisymmetry, overventilated CH4/Air diffusion flame above the packing bed are presented to study the flame height, flame shape and its stability. The burner is a quartz tube packed with alumina pellets, in which a cylindrical fuel stream is surrounded by a coflowing air jet. Results show that bed heights and diameter of pellets have significant influence on flame properties. In general, the flame above the bed surface is axisymmetry and its shapes and color like the conventional diffusion flame when the bed length is smaller. The flame height gradually decreased and the its shape became wider with increases in bed length. Meanwhile, the color of the flame front varied with bed length, the changed color indicted that flame front temperature increase, and that the combustion regime above the bed surface may transfer from non-premixed combustion to partial premixed combustion, and even premixed combustion regime due to the dispersion effect in porous media.
发表时间：2015-07-19