横風を受ける水素噴流拡散火炎に関する研究 : 第1報, 安定限界と火炎形状

概要

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The combustion characteristics of hydrogen jet diffusion flames on a flat plate in a cross flow were experimentally studied. It was found that stability limits and shapes of the flame were affected strongly by the air stream velocity U_e of the cross flow. In this experiment, when U_e was slower than 9.5m/s, there existed critical injection velocities of hydrogen U_j at which a hole appeared on the front side of the flame at the transition point from laminer to turbulent. As the hydrogen injection velocity U_j was increased further, the hole became larger and finally the flame was lifted, not to blowout. When U_e was increased more than 9.5m/s, flames with a hole were formed as soon as hydrogen was injected. When U_e was increased more than 16m/s, the flame occurred to blowout. No flame stabilized at the air stream velocities over than 21m/s. The effect of U_e and U_j on the flame shapes was also investigated. It was cleared that the momentum ratio of the air stream to the hydrogen jet was the most important parameter determining the flame shapes.
社団法人日本機械学会の論文
1992-05-25