環状噴流バーナに関する研究 : 火炎パターンと燃焼安定範囲

概要

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We studied premixed gas combustion experimentally using annular nozzles which have coaxial bluffbody in a pipe. Cross-sectional area of nozzles is kept constant, while the opening width between the inner surface of nozzles and the outer surface of bluffbody is varied. We find that an annular nozzle has four flame patterns : flame attached to outer edge, flame attached to both outer and inner edges, flame attached to inner edge and lifted flame. Each flame pattern is dependent on mixture gas velocity and the equivalence ratio. Furthermore, each flame pattern region is affected by the ratio of the inner diameter to the outer diameter of the annular nozzle. This ratio has an optimum value, which gives maximum velocity at the lean limit in the region of flame attached to inner edge.
社団法人日本機械学会の論文
1993-07-25