摘要
柴油机排气过程中的微粒运动和沉降对微粒测量、排气再循环系统的正常工作以及微粒的净化捕集等具有重要的影响.利用微粒受力模型和微粒随机轨道模型,对湍流通道中微粒的输运特性以及微粒受力对其输运特性的影响进行了分析.通过研究,给出了重力、热泳力和Saffman升力在不同条件下对湍流通道内微粒输运特性的影响规律.研究结果对于加深柴油机微粒在湍流通道中运动及沉降规律的理解具有重要的意义.
The movement and deposition of diesel particles in exhaust have an important effects on particle sampling measurement,exhaust gas recirculation system and particle trapping. The moving of particles and the effect of forces on the movement characteristics of the particles in the turbulent flow channel were analyzed using the force models and the particle random trajectory models. The effects of the gravity,thermophoresis force and Saffman lift force on particle movement were studied from this study.The study can deepen the comprehension of the moving and deposition characteristics of diesel particles in the turbulent flow channel.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2014年第4期353-358,共6页
Transactions of Csice
基金
国家自然科学基金资助项目(51276011)
北京市自然科学基金资助项目(3132016)
内燃机燃烧学国家重点实验室开放基金资助项目(k2013-3)
关键词
柴油机
湍流通道
微粒
受力
输运特性
diesel engine
turbulent flow channel
particle
force
movement characteristic
