收缩管角度对车用催化转化器流动特性的影响  

Influence of shrink tube angle on flow in the automotive catalyst converter

作　　者：许建民[1] 刘金武[1] 

机构地区：[1]厦门理工学院机械工程系,福建厦门361024

出　　处：《武汉科技大学学报》2011年第3期233-235,共3页Journal of Wuhan University of Science and Technology

基　　金：厦门市科技计划指导性项目(3502Z20099001)

摘　　要：采用CFD软件对3种出口收缩管角度不同的催化转化器的速度场、压力场进行三维稳态流动数值模拟。结果表明,出口收缩管角度对催化转化器的气流分布有很大影响,对于入口扩张管和载体相同的催化转化器,出口收缩管角度越大,其内部气流分布越不均匀,压力损失也越大。Multi-dimensional numerical simulation of velocity field and pressure field of steady flows in the catalytic converters of three different shrink tube angles of export was performed by using computational fluid dynamic method（CFD）.The results show that,the shrink tube angle of export has a great impact on the flow of catalytic converters.For the catalytic converters having the same import expansion tube and carrier,as the shrink tube angle of export increases,the air distribution of catalytic converters becomes more uneven and the pressure loss becomes larger.

关 键 词：CFD 催化转化器 收缩管角度 速度场 压力场 

分 类 号：TH311[机械工程—机械制造及自动化]