车用SCR系统空气雾化喷嘴的雾化特性研究  

A Study on the Atomization Characteristics of Air Atomizer Nozzle in Vehicle SCR System

作　　者：郑斌[1] 姬丽霞[2] 路春美[2] 孔昭健[3] 

机构地区：[1]山东理工大学交通与车辆工程学院,淄博255049 [2]山东大学,济南250100 [3]北京航空航天大学,北京100083

出　　处：《汽车工程》2009年第4期376-380,303,共6页Automotive Engineering

基　　金：山东省自然科学基金重点项目(Z2006F04)资助。

摘　　要：选择催化还原(SCR)是一种先进的汽车氮氧化物控制技术,而还原剂喷嘴是为实施该技术的喷射系统的关键部件。文中设计了一种外混式空气雾化喷嘴,并对其雾化性能进行了实验研究,主要分析了空气压力、液体压力及测量位置不同时,喷雾的索太尔平均直径、平均轴向速度、平均径向速度、液滴通量等特性参数沿喷嘴径向的分布情况。试验结果表明,所设计的喷嘴具有良好的雾化效果。Selective catalytic reduction vehicles, for which the injection system with its （SCR） is an advanced technology for controlling NOX emission of key component-reductant nozzle is used. In this paper, a new external mixing type airblast atomizer nozzle is designed , and an experimental study on its automation performance is conducted, in which the distribution pattern of characteristic parameters, such as Sauter mean diameter, average axial and radial velocities and flux of atomized droplet along radial direction of nozzle are analyzed under different air pressure, liquid pressure and the location of measurement. The results show that the external mixing type atomizer nozzle designed has good atomization effects.

关 键 词：选择催化还原 空气雾化喷嘴 雾化性能 

分 类 号：U464[机械工程—车辆工程]