棒束定位格架空气-水两相分布数值模拟  

Numerical Simulations on Air/water Two-phase Distribution in Rod Bundles with Grid Spacers

作　　者：王小军[1] 陈炳德[1] 黄彦平[1] 熊万玉[1] 

机构地区：[1]中国核动力研究设计院空泡物理和自然循环国家级重点实验室,成都610041

出　　处：《核动力工程》2003年第4期338-343,共6页Nuclear Power Engineering

摘　　要：用计算流体动力学程序CFX4.2对棒束定位格架通道内空气-水两相流体三维流动进行了数值模拟。在计算中,采用了考虑界面横向效应的两流体模型,用该模型计算模拟了通道的1/4区域和定位格架交混叶片,获得了流体区域的两相流速和相分布;并分析了定位格架交混叶片对流动和相分布的影响。结果表明,带定位格架棒束流道内空气-水两相流动数值模拟基本合理,该方法可用来初步分析复杂通道内的两相流动。The numerical simulations for air/water two-phase flow in rod bundles with grid spacers had been performed using a Computational Fluid Dynamics code CFX.4.2. The modeling principles were presented based on using a two phase-fluid model in which lateral interfacial effects had been considered. This model had been used to evaluate the velocity fields of gas and liquid phases, as well as phase distribution between elements in rod bundles by simulating 1/4 zone of the channel and mixing vane of spacers. Furthermore, this model had been used to predict the effects of spacers on the flow and phase distribution between elements. The comparison of results shows that the numerical simulations for air/water two-phase flow in rod bundles with spacers is rational, which can be used to analyze initially two phase flow in complicated channels.

关 键 词：棒束定位格架 空气-水 CFX4.2程序 两相流 数值模拟 

分 类 号：TL333[核科学技术—核技术及应用]