摘要
采用临界轨道半径思想,对层流管流中不同入口类型下柴油机微粒的热泳沉降特性进行了研究.给出了3种不同入口类型条件下层流管流入口段流场以及微粒热泳沉降的求解方法;分析了对柴油机微粒热泳沉降具有重要影响的层流管流流场的结构特征;在此基础上,对不同入口类型层流管流入口段中柴油机微粒的热泳沉降特性及其影响因素进行了分析.通过研究,获得了柴油机微粒在不同入口类型层流管流入口段中的热泳沉降规律.
The thermophoresis deposition of diesel particulates under different entrance conditions in a laminar flow tube has been analyzed by using the idea of critical particle trajectory radial. The solutions to flow field and thermophoresis deposition of particulates in the entrance part of the laminar flow tube under three different entrance conditions have been put forward. The characteristics of flow field that can affect tbermopboresis deposition of diesel particulates in the entrance part of the laminar flow tube have been analyzed. The characteristics of thermophoresis deposition of diesel particulates in the entrance part of the laminar flow tube under different entrance conditions and the factors that can affect the thermophoresis deposition of diesel particulates have been investigated. This study strengthens the understanding of the characteristics of thermophoresis deposition of diesel particulates in the entrance part of the laminar flow tube under different entrance conditions, and the results of this study can provide some bases for the control of thermophoresis deposition of diesel particulates in laminar flow tube and the therrnophoresis purification of diesel particulates.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2010年第1期11-17,共7页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(40475048
50876007)
内燃机燃烧学国家重点实验室开放课题资助项目(2008-03)
关键词
柴油机
微粒
层流管流
入口
热泳沉降
diesel engine
particulate
laminar flow tube
entrance
thermophoresis deposition
