基于子通道思想的液态金属堆盒间流模拟方法研究  

Research on Simulation Approach of Inter-wrapper Flow in Liquid Metal Cooled Fast Reactor Based on Subchannel Method

作　　者：梁禹 王啸宇 邓坚[1,2] 刘余[1,2] 宋功乐 钟睿诚 张大林[3] 朱大欢[1,2] Liang Yu;Wang Xiaoyu;Deng Jian;Liu Yu;Song Gongle;Zhong Ruicheng;Zhang Dalin;Zhu Dahuan(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Nuclear Power Institute of China,Chengdu,610213,China;School of Nuclear Science and Technology,Xi'an Jiaotong University,Xi'an,710049,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213 [2]中国核动力研究设计院,成都610213 [3]西安交通大学核科学与核技术学院,西安710049

出　　处：《核动力工程》2023年第S02期61-66,共6页Nuclear Power Engineering

基　　金：四川省自然科学基金项目(2023NSFSC1328)。

摘　　要：为探究液态金属堆盒内-盒间冷却剂共轭传热效应,运用子通道思想为盒间特殊结构提供新的模拟手段。基于稳定高效的压力耦合方程组的半隐式方法(SIMPLE算法)求解盒间子通道模型,解决了经典子通道算法在面对低流量、倒流和回流现象上难以收敛的问题。以3组件钠工质实验(CCTL-CFR)为对象,通过组件盒内、盒间冷却剂以及壁面温度的对比,验证了盒间子通道模拟方法的可靠性。针对典型液态金属堆,开展全堆芯热工分析,发现盒间流在展平堆芯径向温度分布、降低温度峰值等方面起重要作用,证明了堆芯热工分析考虑盒间流的必要性。本研究成果为液态金属堆堆芯热工及安全分析提供了可行的分析方法。In order to explore the conjugate heat transfer effect of the coolant between the assmblies and inter-wrapper channels,the subchannel method is applied to provide a new simulation approach for the inter-wrapper flow(IWF).The subchannel model of IWF is solved based on the stable and efficient SIMPLE algorithm to address the issue that the classical subchannel algorithm is difficult to converge in the face of low flow,reverse flow and backflow phenomena.Through the 3-subassembly test using sodium working fluid(CCTL-CFR),the reliability of the subchannel simulation method for IWF is demonstrated by comparing the temperatures of the coolant and wall.Taking the typical liquid metal cooled fast reactor as the object,the thermal-hydraulic analysis of the full core is conducted.It is found that IWF can greatly flatten the radial temperature distribution of the core and reduce the temperature peak value,which proves the necessity of considering the effect of IWF in thermal-hydraulic analysis.This study provides a feasible analysis method for the thermal and safety analysis of liquid metal cooled fast reactors.

关 键 词：液态金属堆 盒间流(IWF) 子通道方法 SIMPLE算法 

分 类 号：TL333[核科学技术—核技术及应用]