LI You¹， WANG Zhong¹， LIU Shuai¹， LI Ruina¹， ZHANG Meijuan^{1， 2}

(1. School of Automobile and Traffic Engineering， Jiangsu University， Zhenjiang 212013，China；2. School of Automotive and Traffic， Wuxi Institute of Technology， Wuxi 214121， China)

Abstract: In order to investigate the characteristics of diesel exhaust particles, the particle size distribution, micro-morphology, 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.

Keywords: diesel engine; exhaust particles; particle size distribution; pore structure; agglomeration

文章编号：1008-5548(2020)02-0070-05

DOI:10.13732/j.issn.1008-5548.2020.02.011

中图分类号：TK421                                文献标志码：A

收稿日期： 2019-09-29，修回日期：2019-11-06，在线出版时间：2019-12-30 17:15。

基金项目：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。

第一作者简介：李游(1993—)，男，硕士研究生，研究方向为柴油机颗粒排放控制。E-mail：liyou_ujs@126.com。

通信作者简介：王忠(1961—)，男，博士，教授，博士生导师，研究方向为内燃机新能源与排放控制。E-mail：wangzhong@ujs.edu.cn。