摘要
根据柴油机的燃烧性质建立均质压燃混合模型—HCCI仿真模型,使正庚烷、空气及过氧化氢均匀混合喷入气缸中燃烧,并通过改变过氧化氢的浓度和在混合气体中的体积分数,分析燃烧过程中不同时刻气体温度和压力的变化。研究表明:过氧化氢的添加确实在某种程度上改善了柴油机的燃烧特性,提高了柴油机的经济效益;但不同的添加比例对柴油机的燃烧特性产生不同的影响;同时柴油机的动力性有所降低。
A homogeneous charge compression ignition model - HCCI model was set up according to the combustion characteristics of diesel engine. N-heptane, air and H2O2 mixture was injected into cylinders, and through the change of H2O2＇s concentration and its volume percentage, the variation of temperature and pressure during combustion was analyzed. The research shows that H2O2 additive definitely improve the combustion characteristics to some degree, and made the diesel engine more economic. However, different percentage of additive may result in different effect, and reduce the dynamic performance of diesel engine may be reduced.
出处
《柴油机》
2011年第1期5-8,共4页
Diesel Engine
关键词
过氧化氢
均质充量压缩燃烧
温度
压力
H2O2
homogeneous charge compression combustion
temperature
pressure
