摘要
对天然气汽车尾气催化转化器的流场进行了稳态流动的数值模拟。模拟结果表明:气体从催化器进气管进入扩张管流动会发生分离,而气体的流动在排气锥管收敛得很好;气体的流动分布在很大程度上依靠催化器扩张管角度;催化器载体中有明显的压降;覆盖在中心孔道表面的贵金属催化剂比边缘区域消耗得快。
The steady flow in the catalytic converters of CNG was simulated. The gas can breakaway in the entering pipe and the flow of the gas can convergence well in the exhaust pipe. The flow distributing mainly depends on the flow capability of the expanding pipe. The pressure falls apparently in the carrier of catalytic converters. The noble metals in the center of the catalytic converters are consumed more quickly than the edge zone.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第6期74-76,共3页
Journal of Chongqing University
基金
重庆市科技攻关项目(2002-07)
关键词
催化转化器
流场
数值模拟
catalytic converters
flow field
numerical simulation
