摘要
为了探究柴油机排放颗粒的特性,采用高倍透射电镜、原子力显微镜和小角度X射线散射分析柴油机排放颗粒的粒径分布、微观形貌、孔隙结构和力学特性等物性参数。结果表明:柴油机排气阶段,沿着排气气流方向,颗粒的平均粒径呈增大趋势,聚集态颗粒所占比例逐渐上升;柴油机排气颗粒的二维小角度散射图像具有相似性,基本呈现同心圆分布;随着排气过程的进行,颗粒的散射强度减弱,散射曲线中散射矢量特征值血in减小,颗粒的吸附力尸就和黏附力Fad逐渐增大。
In order to investigate the characteristics of diesel exhaust particles,the particle size distribution,micromorphology,pore structure and mechanical properties of diesel exhaust particles were analyzed by high power transmission electron microscopy,atomic force microscopy and small angle X-ray scattering.The results show that during the exhaust phase,along the direction of exhaust gas flow,the average particle size increases,and the proportion of aggregated particles increases gradually.In the exhaust process,the two-dimensional small-angle scattering images of diesel particles are similar,showing concentric circle distribution.As the exhaust process proceeds,the scattering intensity of particles decreases,the scattering vector eigenvalue qmin decreases,and the attractive force Fat and adhesion force Fad of particles gradually increase.
作者
李游
王忠
刘帅
李瑞娜
张美娟
LI You;WANG Zhong;LIU Shuai;LI Ruina;ZHANG Meijuan(School of Automobile and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China;School of Automotive and Traffic,Wuxi Institute of Technology,Wuxi 214121,China)
出处
《中国粉体技术》
CAS
CSCD
2020年第2期70-74,共5页
China Powder Science and Technology
基金
国家自然科学基金项目，编号:51776089
中国博士后科学基金项目，编号:2019M651732
江苏高等学校自然科学基金项目，编号:18KJB470006
江苏省高等职业院校专业带头人高端研修资助项目，编号:2019GRFX111
关键词
柴油机
排气颗粒
粒径分布
孔隙结构
团聚力
diesel engine
exhaust particles
particle size distribution
pore structure
agglomeration
