摘要
基于全气缸取样平台,在一台高压共轨柴油机上,对近后喷和远后喷策略下生物柴油和柴油后喷燃烧过程中颗粒物的粒数粒径分布、总粒子数密度及质量的变化规律进行了研究.实验结果表明,在后喷燃烧过程中各阶段,生物柴油和柴油所产生的颗粒物的粒数粒径分布、总粒子数密度及质量变化规律相似.颗粒物粒数粒径均呈类似对数正态分布,生物柴油的峰值粒径范围为39.2~69.8,nm,柴油的峰值粒径范围为60.4~93.1,nm.与柴油相比,在相同后喷燃烧阶段生物柴油的颗粒物的总粒子数密度较高,但质量浓度较低.
Experiments were conducted on a direct-injection diesel engine,which was equipped with a common rail system. The number and size distribution ,the total particulate number density and mass concentration of particulates produced from biodiesel and fossil diesel during the post-injection combustion were investigated using a total cylinder sampling system. Experimental results indicate a similar tendency for biodiesel and diesel in the variation of number and size distribution,total particulate number density and mass concentration of particulates at the same stage of post-injection combustion. The number and size distributions of particulates for both fuels ap-proximate to the lognormal distribution,with the peak values in the range of 39.2-69.8,nm for biodiesel and of 60.4-93.1,nm for diesel. At the same stage of post-injection combustion,the total particulate number density for biodiesel is higher than that for diesel,while an opposite result is found in the mass concentration of particulates.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2017年第3期261-267,共7页
Journal of Combustion Science and Technology
基金
国家重点基础研究发展计划(973计划)资助项目(2013CB228502)
天津市应用基础与前沿技术研究计划资助项目(13JCZDJC 35800)
国家自然科学基金资助项目(51476115)
关键词
全气缸取样平台
生物柴油
柴油
后喷燃烧
粒数粒径分布
颗粒物质量浓度
total cylinder sampling system
biodiesel
diesel
post-injection combustion
size and number distribution
mass concentration of particulate
