DMEの低温酸化過程におけるH0_2生成反応が自着火に及ぼす影響について(エンジンと新燃料(1),エンジンと新燃料)

概要

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Recent chemical kinetics study of CH_3OCH_2 + O_2 reaction with the direct detection of HO_2 suggested that the established dimethyl-ether (DME) oxidation model may be revised in terms of the rate constant and branching fractions in CH_2OCH_2O_2H decomposition reactions (reaction 4), where originally only OH + 2HCHO product channel has been considered. In this study, we simulated the combustion in an HCCI engine of DME fuel using the detailed oxidation model with and without revising the reaction 4. It was found that the reduction of k_4 promotes both of cool and hot ignitions, whereas including a pathway producing HO_2 decelerates the cool ignition but reduces the period between cool and hot ignitions, corresponding to the increase of cool ignition heat releases.
社団法人日本機械学会の論文
2004-09-04