予混合圧縮自己着火エンジンにおけるジメチルエーテル空気予混合気の着火燃焼の素反応数値計算 : 熱工学,内燃機関,動力など

概要

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Homogeneous Charge Compression Ignition (hereafter HCCI) engine can realize low emission and high thermal efficiency. However, its ignition and combustion processes are difficult to control and thus the reaction mechanisms of auto-ignition and combustion are needed to be clarified. In this study, the numerical calculation of auto-ignition and combustion processes in HCCI engine is carried out. Curran et al.'s DME (Dimethyl Ether) elementary reaction model is used. The results of the calculations are compared with the experimental results and the validity of the elementary reaction model is investigated. And followings are investigated : the influence of equivalence ratio, intake temperature, EGR ratio and engine speed on rate of heat release, ignition timing, ignition temperature and histories of species' mole fractions. As a result, Curran et al.'s model can qualitatively predict the influence of equivalence ratio, intake temperature on the ignition timings and the peeks of the rate of heat release.
社団法人日本機械学会の論文
2001-05-25