定常高温空気流中における燃料噴霧の着火 : 第1報,混合燃料の着火特性

概要

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In order to elucidate the basic ignition characteristics of mixed fuel sprays, ignition delay was measured on sprays injected perpendicularly to hot air flow under atmospheric pressure. The solution fuels of ethanol/Diesel-oil, ethanol/gasoline and methanol/gasoline, and the emulsion fuel of Diesel-oil/water, were used as fuel. The following results were obtained: (1) In all the fuels examined in this experiment, the temperature dependence of ignition delay was of the Arrhenius type with constant activation energy. (2) When Diesel-oil or gasoline is mixed with ethanol or methanol, and increase in the ignition delay is small with an alcohol content of less than 50% in weight. Ignition delay increases considerably with a content of 75%, but a 10~15℃ rise in air temperature shortens the lag by the same amount as the increase. (3) Ignition delay of Diesel-oil/water emulsion fuel sprays τ can be related to Diesel-oil content C_f as τ~C_f^<-a>, where a is a positive constant.
社団法人日本機械学会の論文
1985-12-25