水素-メタン拡散火炎の数値解析 : 選択拡散の影響

概要

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Numerical computations were made of axisymmetric laminar jet diffusion flames taking into account detailed chemical kinetics and multicomponent diffusion. The computations were in good agreement with the experimental results of temperature and species concentration in hydrogen-methane flames with coflowing air obtained by Ishizuka and Sakai. It was shown that preferential diffusion of heat and species causes significant excesses and deficits of enthalpy as well as an increase and decrease of the H_2 mole fraction in the flame. These effects result in higher flame temperature than the maximum adiabatic temperature in the upstream region, and significantly lower temperature near the flame tip. The temperature decrease induced by the decrease of H_2 mole fraction and decrease of excess enthalpy near the flame tip resulting from preferential diffusion is believed to be the rational explanation for the flame tip extinction.
一般社団法人日本機械学会の論文
1993-02-25