电控高压共轨柴油机排气微粒的测量及数值模拟  

Experimental and CFD Study on Exhaust Particulate from Diesel Engine with Common Rail Injection System

作　　者：张铁臣[1] 宋崇林[1] 裴毅强[1] 董素荣[1] 魏国东[2] 杨铁皂[2] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]河南科技大学车辆与动力工程学院,洛阳471039

出　　处：《燃烧科学与技术》2007年第2期136-140,共5页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2002CB211603);国家自然科学基金资助项目(5057606750476066)

摘　　要：利用改进后的全气缸取样系统,对不同工况下高压共轨电控柴油机燃烧过程中的微粒生成历程进行测量.同时,采用三维CFD数值模拟方法分析了微粒的生成机理.结果表明,微粒质量浓度曲线呈单峰状,微粒生成质量随负荷的增大而增加;发动机排出微粒是碳烟粒子生成和氧化这两个过程综合作用的结果.加强缸内的气流运动和合理组织燃烧过程,有助于减少微粒的生成.The mass concentration of exhaust particulate from diesel engine with electronically controlled fuel injection system was measured by using an improved total cylinder dumping system under different conditions. Furthermore, the particulate formation mechanism was investigated by means of CFD modeling. The study shows that in the cylinder the mass distribution of diesel particulate produced during combustion process was of single-peak style, and its mass concentration was increased with the increase of engine load; that the temporal rate of engine-out particulate is the difference between the particulate rate of formation and of oxidation. The exhaust particulate can be reduced remarkably by means of strengthening in-cylinder flow and organizing precisely combustion in the cylinder.

关 键 词：柴油机 全气缸取样 数值模拟 微粒 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]