摘要
为了进一步了解代用燃料乙醇在HCCI燃烧中的应用,结合动力学软件CHEMKIN建立了乙醇燃烧的化学动力学模型,对进气温度、压缩比、进气压力对HCCI燃烧的影响进行了模拟,对HCCI的排放特性进行了分析。结果表明:HCCI燃烧明显受化学反应动力学控制,对进气温度变化反应敏感。进气温度对气缸内的温度和排放的影响显著;但是进气温度升高后CO的摩尔分数的最大值减小。转速对缸内温度的影响不明显;随着压缩比增大着火提前,压缩比对气缸内的最高温度和排放影响显著。
To learn more about in the application of the ethanol which is an alternative fuel in HCCI, a model of chemical kinetics model for ethanol oxidation is established with CHEMKIN, a software for kinetics. The simulation is aimed at the influence on the HCCI, which is produced by inlet temperature, compressive ratio in cylinder,inlet pressure. The characteristic of HCCI emissions is analyzed. The results show that HCCI combustion is obvious controlled by the chemical reaction kinetics, and sensitive to the change of temperature. Inlet humidity greatly affects on the temperature in the cylinder and emission. But with the rising of the inlet temperature, the maximum of the CO mole fraction decreased. The rotate speed affects the cylinder temperature is not obvious. With the increase of compression ratio, ignition ahead of schedule, cylinder compression ratio has a significant impact on the maximum temperature in cylinder and emissions.
出处
《世界科技研究与发展》
CSCD
2011年第5期858-860,866,共4页
World Sci-Tech R&D
关键词
HCCI
乙醇
排放
压缩比
进气温度
HCCI
ethanol
emission
compressive ratio in cylinder
inlet temperature
