大型液氦杜瓦结构设计与漏热分析  

Thermal analysis and optimization of large liquid helium dewar leakage

作　　者：胡咸军 黄天亮 张玉建 陈杰 董文庆 Hu Xianjun;Huang Tianliang;Zhang Yujian;Chen Jie;Dong Wenqing(CSIC PRIDe Cryogenic Technology Co.Ltd,Nanjing 211100,China)

机构地区：[1]中船重工鹏力(南京)超低温技术有限公司,南京211100

出　　处：《低温与超导》2024年第2期97-102,共6页Cryogenics and Superconductivity

基　　金：国家重点研发计划(2020YFF01014704)资助。

摘　　要：为了维持较低的液氦蒸发率,对液氦杜瓦的整体结构设计及漏热要求极高。本文建立了以蒸发冷氦气作为冷屏冷源的杜瓦的结构强度设计以及绝热系统设计方法,利用三维软件建模、仿真软件进行热传导、热固耦合仿真分析,对液氦杜瓦的结构强度、漏热进行了系统分析,实现了容积为4000 L时漏热为1.37 W、日蒸发率为1.15%气冷屏结构的液氦杜瓦,为蒸发氦气为冷屏的大型液氦杜瓦提供了设计思路。In order to matain a reduced liquid helium evaportion rate,the overall structural design and heat leakage require⁃ments of the liquid helium Dewar are extremely high.The structural strength design and insulation system design method of Dewar with evaporating cold helium gas as the cold shield and cold source were established.The structural strength and heat leakage of liquid helium Dewar were systematically analyzed by using 3D modeling and simulation software for heat conduction and ther⁃mosolid coupling simulation analysis.The daily evaporation rate of 1.15%was realized with a volume of 4000 L liquid helium dewar.It can provides a design idea for large liquid helium dewar with evaporating helium as cold shield.

关 键 词：液氦杜瓦 漏热分析 日蒸发率 爆破管设计 热声振荡 

分 类 号：TP658[自动化与计算机技术—控制理论与控制工程]