摘要
设计制作了车用催化器若干端面造型载体和扩张管,进行了稳态气流数值模拟和试验验证,分析了载体前端面型式、扩张管型式及其匹配关系等对气流径向分布特性的影响．研究表明,采用锥形和球形端面载体可以提高催化器内部气流径向分布的均匀性;锥形端面载体与增强型扩张管(EDH)匹配,对气流径向分布状态有显著改善作用;综合考虑气流分布均匀性、可靠性和结构紧凑性等因素,锥形载体前端面顶角宜在60-90°范围内．
A steady gas flow in automotive catalyst converter with fore -end shaped honeycomb carrier was simulated based on ANSYS - CFD code and tested as welt as the influence of the carrier fore - end types matching of diffusion header on flow diametral uniformity. The effects showed that coneheaded and sphereheaded honeycomb carrier improved the flow diametral distribution especially in coneheaded honeycomb carrier matching of EDH. The cone apex angle should be controlled between 60° and 90° so as to get comprehensive advantages of better flow distributional uniformity in diameter, desired reliability and small size of converter.
出处
《车辆与动力技术》
2007年第1期24-27,31,共5页
Vehicle & Power Technology
关键词
车用催化器
载体端面型式
扩张管
耦合
气流径向分布
automotive catalyst converter
shapes of fore -end honeycomb carrier
diffuser
match
gas flow diametral distribution
