D324 噴流拡散火炎におけるスカラー保存量に関する数値解析

概要

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Mixture fraction is a very important quantity for nonpremixed combustion modeling and is a conserved scalar whose conservation equation does not include any source terms even in reacting flowfields. In this paper, the DNS data of a hydrogen / air jet diffusion flame is analyzed using mixture fraction and its dissipation rate (scalar dissipation rate). PDF of mixture fraction in the mixing core region shows a β-distribution like feature. The distribution of mixture fraction is complicated in unburnt mixing region and smooth in the flame. The simulated distribution of sealar dissipation rate validates the theoretical quenching criterion defined by sealar dissipation rate.
日本流体力学会の論文
2001-07-31