光学計測による乱流微粉炭燃焼火炎の詳細構造の観察 : 第2報,燃焼反応領域と微粉炭粒子存在領域の瞬時二次元同時計測(熱工学,内燃機関,動力など)

概要

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In this work, we targeted combustion reaction zone of the primary air in the actual pulverized coal burners, and the burner was fabricated as open type in order to apply various optical measurement techniques. In the second report, simultaneous measurement of OH-PLIF and Mie-scattering image of pulverized coal particles was performed, and the spatial relation between combustion reaction zone and pulverized coal particle zone was examined. It was found that, in the upstream region, combustion reaction occurs only in the periphery of the clusters where high-temperature burnt gas of the methane pilot flame is entrained and oxygen supply is sufficient, and that, in the downstream region, however, combustion reaction can be seen also inside of clusters of pulverized coal particles. This is because, in the downstream region, the devolatilizaion process of the coal particles proceeds accompanied by temperature rise of the particles and mixing process between the volatile matter and circumference air is prompted. From these results, it can be said that the present diagnostics techniques are quite effective for evaluating the pulverized coal flames.
社団法人日本機械学会の論文
2005-11-25