车用催化转化器内流场及结构优化分析  

Numerical Simulation of Internal Flow Field and Optimal Design of Automotive Catalytic Converters

作　　者：邓召文[1] 高伟[1] 

机构地区：[1]湖北汽车工业学院汽车工程系,湖北十堰442002

出　　处：《湖北汽车工业学院学报》2011年第3期5-9,共5页Journal of Hubei University Of Automotive Technology

基　　金：湖北省教育厅B类科研项目(B2011808)

摘　　要：催化转化器是目前最有效的汽车排放控制装置,利用计算流体动力学CFD方法,建立某款汽油车催化转化器的三维内流动数学模型,对催化转化器内的流动特性进行了稳态流动数值模拟,研究分析催化转化器入口管角度及载体结构样式对其内速度场、温度场、压力场等特性的影响,以指导催化转化器的结构设计。结果表明30°入口管和球形端面载体结构是较为理想的催化转化器结构形式。3D internal flow filed model for catalytic converter of a gasoline car was established, the steady state flow numerical simulation about internal flow filed of catalytic converters was performed using the computational fluid dynamics CFD technique. The internal velocity, temperature fields and pressure field characteristics for various structural catalytic converters such as different inlet angles and the carrier shape were simulated and analyzed. The simulation results provide a basis for optimal design of the catalytic converters. The results show that the angle of 30~ inlet and globose end surface carrier are better structural design.

关 键 词：催化转化器 CFD 入口管 载体 结构设计 

分 类 号：U464.134.4[机械工程—车辆工程]