摘要
利用高分辨率透射电镜研究了三缸直喷式柴油机在两种供油提前角和两个工况时,燃用两种比例的生物柴油/柴油混合燃料时产生的颗粒微观结构和尺寸。结果表明,在所研究的条件下,发动机燃料燃烧产生的颗粒由球形的原始粒子构成,且呈现出不同形状,具有分形结构特性;原始粒子具有多层类石墨微晶结构,且存在无序内核区。B0和B20燃料产生的原始粒子的直径分别在25.6～31.3 nm和28.7～40.0 nm之间,燃用生物柴油时产生的颗粒原始粒子平均直径大于柴油。
Microstructure and size of particle emitted from the three-cylinder,direct injection diesel engine were investigated by using HRTEM under two fuel supply advance angles,two operating conditions and two kinds of proportions of biodiesel/diesel blends.The results indicated that under the research conditions,spherical primary particles consisted of the particles generated by the combustion of the fuels.The particles exhibited the different shapes and characteristics of fractal structure.The primary particles have multilayer graphite-like microcrystal structure.The diameters of primary particle for B0 and B20 are ranged between 25.6~31.3nm and 28.7~40.0nm,respectively.Mean diameter of primary particles of B20 is larger than that of B0.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2012年第7期19-23,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
清华大学汽车安全与节能国家重点实验室开放基金资助项目(KF11161)
中国博士后科学基金资助项目(20090460860)
河南科技大学博士启动基金资助项目(09001327)
河南省基础研究资助项目(092300410125)
关键词
柴油机
生物柴油
颗粒排放
微观结构
电镜分析
Diesel engine
Biodiesel
Particle emissions
Microstructure
HRTEM analysis
