斜扩张管催化器流场三维数值模拟和结构优化设计

3-D Numerical Simulation of Flows in Oblique Diffuser Catalytic Converter and Its Application on Optimum Structure Design

采用计算流体力学 (CFD)软件 ,对具有良好流动特性的斜扩张管催化器进行了三维稳态流动数值模拟 ,并研究了扩张管倾斜角和入口管布置对流动特性的影响。研究结果表明 :扩张管倾斜角在 6 0°附近可使催化器获得较均匀的流速分布和较小的压力损失 ;

The inlet diffuser configuration plays a significant role on the flow distribution and pressure loss in catalytic converters.A computational fluid dynamics (CFD) code was used to simulate the three dimensional steady flows in an oblique diffuser catalytic converter.Effects of the inclined angle of the diffuser and the layout of the inlet pipe on the flow characteristics were investigated.Simulation results show that a uniform velocity distribution and low pressure loss can be obtained with the inclined angle of about 60°.In addition,the inlet pipe should be concentric with the diffuser for better flow features.