密閉容器内均一混合気の燃焼に及ぼす旋回乱流の影響 : 第3報,燃焼に及ぼす当量比の影響

概要

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Experiments were performed to make clear the effects of the equivalence ratio and the turbulence characteristics on the combustion of a propane-air homogeneous mixture. A turbulent flame propagating nearly axisymmetrically in the swirling flow was produced in a disc-type combustion chamber. The burning velocity S_r, the burning zone thickness δ_r of turbulent flames and the laminar burning velocity S_L, were measured under various conditions. The main results obtained are as follows: (1) Both S_r and S_L depend on the equivalence ratio and have a maximum value under the condition of slightly rich mixture, (2) the value of δ_r increases with the increase of S_r/S_L, (3) the ratio of the burn duration of main combustion stage to the total burn duration decreases and the ratio of the early combustion stage increases with the increase of turbulence intensity, but those are almost independent of the equivalence ratio.
一般社団法人日本機械学会の論文
1988-10-25