摘要
在实际的工程中,矩形窄缝多通道得到广泛的应用,各通道之间的流动交混特性是设计者非常关心的问题之一。采用CFD程序CFX数值模拟了主通道入口流量分配对矩形多通道内流动交混的影响。研究结果表明,入口流量分配对多通道内的流动交混行为影响较大,主通道给定入口平均流量时,各个通道内的流量在轴向上基本不发生变化;主通道入口流量按照一定的比例分配后,流体在轴向交混段存在交混行为,其比例分配偏差越大,主通道的交混越强烈;流体经过全部轴向段的交混后,各个通道内的流量都趋于一致,以前4段的流动交混较为明显。
Flow and heat transfer in the narrow rectangular multi-channel is widely encountered in the engineering application, hydrodynamic mixing in the narrow rectangular multi-channel is one of the important concerns. With the help of the Computational Fluid Dynamics code CFX, the effect of flow rate distribution of the main channel at the inlet on hydrodynamic mixing in the narrow rectangular multi-channel is numerical simulated. The results show that the flow rate distributions at the inlet have a great effect on hydrodynamics mixingin multi-channel, the flow rate in the main channel doesn＇t change with increasing the axial mixing section when the average flow rate at the inlet is set. Hydrodynamic mixing will arise in the mixing section when the different ratio of the flow rate distribution at the inlet is set, and hydrodynamic mixing increases with the difference of the flow rate distribution at the inlet increases . The trend of the flow rate distribution of the main channel is consistent during the whole axial mixing section, and hydrodynamic mixing in former 4 mixing section is obvious.
出处
《核科学与工程》
CSCD
北大核心
2008年第1期51-55,共5页
Nuclear Science and Engineering
关键词
矩形窄缝
多通道
流动交混
CFD程序
rectangular narrow channel
multi-channel
hydrodynamic mixing
CFD code
作者简介
徐建军（1980-），男，山东沂水人，助理研究员，博士生，从事反应堆热工水力研究
