一种常闭翅片式冷冻阀的结构设计与有限元分析  

Structural Design and Finite Element Analysis of a Normally-Closed Finned Freeze Valve

作　　者：蒋鑫越 王纳秀[1] 苏博 陈玉爽[1,2] 孔祥波 陆惠菊[1] 傅远 Jiang Xinyue;Wang Naxiu;Su Bo;Chen Yushuang;Kong Xiangbo;Lu Huiju;Fu Yuan(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Jiading Campus,Shanghai,201800,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800 [2]中国科学院大学,北京100049

出　　处：《核动力工程》2019年第6期149-154,共6页Nuclear Power Engineering

基　　金：中国科学院战略性先导科技专项（XDA0201002）;国家自然科学基金(91326201)

摘　　要：在钍基熔盐堆(TMSR)二回路中冷冻阀TMSR-FV1的功能是充当常闭截止阀。TMSR-FV2为TMSR-FV1的改进版,其在保持TMSR-FV1整体不变的情况下,在外表面增加翅片以增强传热。本文采用有限元方法对TMSR-FV2进行了结构设计和传热分析,研究自然冷却条件下翅高、翅厚和翅距等因素对TMSR-FV2内熔盐冻堵效果的影响,提出了一种翅片结构,并与TMSR-FV1在自然冷却及不同冷却流量条件下的实验冻堵效果进行了对比。计算结果表明:在研究范围内,本文提出的TMSR-FV2翅片结构有效降低了冷冻阀扁平段中心熔盐温度,对提升冷冻阀冻堵效果明显,实现了冷冻阀非能动关闭功能。The freeze valve TMSR-FV1 functions as a normally closed shut-off valve in the secondary loop of the Thorium-based Molten Salt Reactor(TMSR). TMSR-FV2 is an improved version of TMSR-FV1, which heat transfer is enhanced by adding fins to the outer surface of freeze valve while keeping its size intact. In this paper, the Finite Element Method was used to make structural design and thermal analysis of TMSR-FV2. The effects of fin height, fin thickness and fin pitch on the cooling of molten salt in TMSR-FV2 under natural cooling conditions were studied. A finned freeze valve structure was proposed and compared with the experimental salt plug effect of TMSR-FV1 under natural cooling and different cooling flow conditions. The calculation results show that the proposed TMSR-FV2 effectively reduces the central molten salt temperature of the flat section to enhanc the salt plug of the freeze valve and realizes the passive closing function of the freeze valve within the scope of the research.

关 键 词：翅片 冷冻阀 有限元 熔盐堆 

分 类 号：TL353.1[核科学技术—核技术及应用]