摘要
以一台电控高压共轨柴油机为样机,使用排气颗粒数量及粒径分析仪EEPS,研究了发动机燃用生物柴油的核态颗粒排放特性。所用燃油为纯柴油、生物柴油掺混配比分别为5%、10%和20%的B5、B10和B20燃料。结果表明:发动机排气颗粒数量随粒径变化呈现明显的单峰或双峰对数分布形态,核态颗粒的峰值粒径在6 nm至10 nm之间。生物柴油配比上升,增加了该机核态颗粒的峰值数量浓度,颗粒总数量浓度大都呈持续上升趋势,其中核态颗粒数量增加占有主导因素;在低负荷燃用低配比生物柴油燃料时,B10燃油的颗粒总数量浓度最低。
In this paper, biodiesel fuels were used on a direct injection, high pressure common-rail diesel engine. Effects of biodiesel on particle number and size distribution of the diesel engine are studied using an Engine Exhaust Particle Sizer （EEPS）. A pure petroleum diesel and three different blends of petroleum diesel/biodiesel （5%, 10% and 20% v/v biodiesel blends） were tested without engine modification. For all test fuels, the particle number and size distribution show unimodal or bimodal log-normal distribution, with a nucleation mode peak value in 6 nm to 10 nm particle diameter. With the biodiesel blend ratios increasing, the peak value of number of nucleation mode particles increases, and the total particle number ascend at most engine operating conditions. Nucleation mode particles dominate the total particle number. The total particle number of B10 fuel is lowest at lower engine loads.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第7期1231-1234,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50906062)
国家863计划(No.2008AA11A169)
高等学校博士点基金(No.20070247058)
关键词
柴油机
生物柴油
排放
核态颗粒
粒径分布
diesel engine
biodiesel
emission
nucleation mode particle
size distribution
作者简介
谭丕强（1974-），男，山东临沂人，副教授，博士后，主要从事内燃机排放控制和清洁燃料研究。
