柴油机NO_x催化器还原剂添加方案优选  

Optimization of Reductant Adding Scheme for Diesel NO_x Catalyst

作　　者：孙建军[1] 帅石金[1] 王建昕[1] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《车用发动机》2004年第4期35-38,共4页Vehicle Engine

基　　金：863项目"NOx催化剂与柴油机的系统集成和匹配优化"资助(2001AA64304003)

摘　　要：运用计算机辅助分析手段(CAD/CFD)对柴油机NOx催化器还原剂与排气的混合过程进行了模拟,通过考察不同还原剂添加方案下催化器内还原剂的浓度分布,研究了添加位置、喷油器型式及喷射方向等因素对还原剂浓度分布的影响,研究结果为还原剂添加系统的方案优选提供了依据。This paper use the method of computer aided analysis (CAD / CFD) to simulate the mixing process of diesel NO_x catalyst reductant with exhaust gas. Several factors, such as adding position, type of nozzle and direction of spray, are taken into account to study their effect on the distribution of reductant by considering the distribution of reductant on the section of the converter in several reductant adding schemes. The result can provide some principle to optimize the reductant adding scheme.

关 键 词：柴油机 NOx催化器 SCR CFD 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]