自然循环瓣阀开启行为的分流域耦合仿真方法  

Watershed coupling simulation method for the natural circulation flap valve opening behavior

作　　者：丰收 王福鹏 孙汝雷 岳芷廷[2] 田瑞峰[1] 高璞珍[1] FENG Shou;WANG Fupeng;SUN Rulei;YUE Zhiting;TIAN Ruifeng;GAO Puzhen(College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;School of Nuclear Science and Technology,Beijing 102413,China)

机构地区：[1]哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001 [2]中国原子能科学研究院,北京102413

出　　处：《哈尔滨工程大学学报》2022年第12期1691-1697,共7页Journal of Harbin Engineering University

基　　金：中核集团领创科研项目(KY90200210022).

摘　　要：为了探讨主泵失效事故初期自然循环瓣阀开启过程中反应堆堆芯及堆水池的流场变化及自然循环瓣阀不同的结构参数对堆芯内部冷却剂导出的影响,本文以自然循环瓣阀结构为核心建立了反应堆三维数值模型。采用重叠网格方法对自然循环瓣阀的开启行为进行仿真分析,获得了不同安装高度的自然循环瓣阀开启过程的速度场、自然循环瓣阀流道和堆芯进出口的流量变化。从定性和定量的角度分析验证了自然循环瓣阀的可靠性,为自然循环瓣阀的最优化设计提供了参考。This study aims to investigate the flow field changes of the reactor core and pool during the opening of the natural circulation valve in the early stage of a main pump failure accident and the influence of different structural parameters of the natural circulation valve on the export of a coolant inside the core.A three-dimensional numerical model of the reactor is established based on the structure of the natural circulation valve.The overset grid method is used to simulate the opening behavior of the natural circulation valve,obtaining the velocity field,natural circulation valve flow channel,and core inlet and outlet flow rates in the natural circulation valve opening process with different installation heights.The reliability of the natural circulation valve is verified through qualitative and quantitative analyses,which provides a reference for the optimal design of natural circulation valves.

关 键 词：低温供热堆 主泵失效事故 反应堆堆芯 自然循环瓣阀 重叠网格 分流域耦合 流场 敏感性分析 

分 类 号：TL364[核科学技术—核技术及应用]