摘要
本文采用计算流体力学(CFD)方法针对不同流通横截面的7根棒束组成的快堆燃料组件进行数值模拟,分析绕丝直径与六角管内对边距设置对组件热工水力性能的影响。结果表明,绕丝对冷却剂具有强烈的搅混作用,在起到定位作用的同时,为热平衡提供驱动力。通过改变燃料组件流道结构,即采用外圈小直径绕丝并缩小内对边距的设置,可以对冷却剂在不同子通道中的流量进行重新分配,具有更好的热工水力性能。
This paper uses computational fluid dynamics(CFD)method to simulate the fast reactor fuel assemblies composed of 7 bundles with different flow cross sections,and analyzes the influence of the diameter of the wire-wrap and the setting of the margin in the hexagonal tube on the thermal hydraulic performance of the assemblies.The results show that the wire-wrap has a strong mixing effect on the coolant,and provides a driving force for the heat balance while positioning.By changing the fuel assembly flow path structure,that is,the setting of small diameter wire-wrap with outer ring and narrowing inner-to-edge distance is adopted.,the flow rate of the coolant in different sub-channels can be redistributed,and the thermal hydraulic performance is better.
出处
《科技视界》
2019年第12期1-3,68,共4页
Science & Technology Vision
关键词
快堆
绕丝
六角管对边距
热工水力
CFD
Fast reactor
Wire wrap
Hexagonal pipe to margin
Thermal hydraulics
CFD
