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采用最新的二甲醚(DME)化学动力学反应机理(DME氧化机理包括399个基元反应,涉及79种组分),利用LawrenceLivermore国家实验室开发的HCT软件,进行DME均质充量压燃着火过程的变参数研究。从理论上分析讨论进气温度、进气压力、燃空当量比、发动机转速对燃烧的影响。研究结果表明:DME的均质充量压燃(HCCI)燃烧过程有明显的两阶段,进气温度、进气压力、燃空当量比和发动机转速等参数的改变都会导致DME均质压缩燃烧过程的变化。
Using the latest dimethyl ether (DME) chemical kinetic reaction mechanism (DME oxidation mechanism includes 399 elemental reactions involving 79 components), using LawrenceLivermore National Laboratory HCT software for DME homogeneous charge compression ignition Study on the Variation of Ignition Process. From the theoretical analysis of intake air temperature, intake pressure, air-fuel equivalent ratio, the engine speed on the combustion. The results show that there are obvious two stages in HCCI combustion, and the change of parameters such as intake air temperature, intake air pressure, air-fuel equivalence ratio and engine speed will lead to the homogeneous compression combustion process of DME The change.