圧力こう配のある流れ場における火炎の安定性および保炎 : 円柱による保炎特性と後流渦構造の関係

概要

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An experimental study is made on turbulent diffusion flames stabilized by a circular cylinder in a divergent flow. In this paper, stabilization characteristics and flame structure are examined by varying the divergent angle of duct. The fuel used is a commercial grade gaseous propane supplied by exudation from a sintered metal smoothly embodied in the backward stagnation region of the rod. It is found that the positive pressure gradient greatly influences the eddy structure behind the rod, and that two different kinds of combustion patterns exist at the blowoff limit depending on the divergent angle of the duct. They are distinguished by their wake structures: one associated with Karman vortex shedding, the other without it. Also, the blowoff velocity in the former is found to be higher than that in the latter.
一般社団法人日本機械学会の論文
1990-08-25