摘要
复杂通道是介于典型通道和典型栅元之间的几何结构,在通道形状、加热方式等方面更接近于原型组件。本文以小棒束2×2结构为分析对象,采用计算流体力学(CFD)工具分析组件内的温场特征,并讨论热流密度、质量流速等热工参数对通道平均换热系数的影响。结果表明,减小热流密度、增加质量流速都会增强换热。棒束结构的壁面温度分布存在明显的周向不均匀性,固体壁面导热会有效抑制这种周向不均匀性,进而增强通道的换热能力。
Complex channel lies between the typical channel and the typical cell, and is closer to the original rod bundles in channel shape and heated conditions. In this study, numerical simulations with CFD tools has been done to the 2×2 rod bundles. The heat transfer characteristics were analyzed and the impact of heat flux and mass flux was discussed as well. It was found that the increased mass flux or decreased heat flux will contribute to the improvement of the heat transfer capability. The wall temperature was non-uniform along the circumferential direction and the heat conduction of the solid wall may help impair this non-uniformity.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2013年第1期133-136,145,共5页
Nuclear Power Engineering
关键词
2×2棒束
传热特性
周向不均匀性
流固耦合
2 ×2 rod bundle, Heat transfer characteristics, Circumferential non-uniform, Fluid and solid coupling
