層流境界層に形成される拡散火炎の構造と特性の数値解析 : 第2報 : 燃料供給条件および固体域伝熱特性の影響 : 熱工学 , 内燃機関 , 動力

概要

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The effects of fuel injection velocity and solid surface temperature on the diffusion flames in laminar boundary layers over solid surfaces have been numerically analyzed. The basic equations are solved using a finite-difference method for two-dimensional flow field with one step reaction of methane with air. The flame shape, flow field, diffusion of component gas, heat transfer, etc. are examined. The flame stability limit and the characteristics of the flames near critical conditions are made clear. Although the fuel injection velocity is greatly decreased, the flame stability can be maintained with increase in the concentrations of oxygen and fuel diffusion paths near the leading flame edge. The oxygen and fuel consumption rates in the flame zone are found to be independent of the fuel injection velocity. Aspects of the flame scarcely change even if the solid surface temperature greatly increases depended on the decrease in the thermal conductivity of solid region.
社団法人日本機械学会の論文
2001-03-25