よどみ点流れ場における2成分系燃料の発火解析

概要

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Ignition problem is presented for a mixed condensed fuel of n-hexane and solid paraffin in a hot-air stagnation-point flow. The former experiment showed that the variation of ignitable limit velocity with the mass fraction of volatile hexane had a local minimum. This paper demonstrates the theoretical proof for the characteristic change of ignitable limit by use of the asymptotic analysis in a large activation energy. To know the melting behavior of gel-type mixture, the temperature hisories of the condensed-phase are measured first. Using a unified model based on the temperature measurements, an equation for ignitable limit is derived in a simple form. It is found that the characteristic phenomenon in ignitability is caused by the competitive change of gasified fuel concentration, fuel surface temperature and the heat of fusion of the mixed fuel.
社団法人日本機械学会の論文
1985-07-25