513 対向流中に形成される拡散火炎の消炎に及ぼす酸化剤加熱と不活性ガス希釈の影響(熱工学)

概要

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Effects of fuel dilution and oxidizer preheating on the extinction of counterflow methane-air diffusion flame have been studied experimentally, considering air temperatures in the range 300 to 700K. The preheating air (supplied lower burner) is diluted by CO_2 while the methane (supplied upper burner) is diluted by N_2, in order to change the heat release rate and fuel composition. The extinction limits indicate that the flame stable region increases significantly with increasing in the oxidizer temperature. Then, the extinction limit can be divided into two distinct regimes depending on the oxidizer dilution ratio. In low oxidizer dilution regime, the extinction concentration of methane does not sensitive for the oxidizer dilution ratio. 0n the other hand, for the high oxidizer dilution regime, the oxidizer dilution ratio significantly affects the extinction of methane concentration.
一般社団法人日本機械学会の論文
2001-03-09