低温下双温区多管道绝热支撑设计及数值模拟研究  

Design and Numerical Simulation of Thermal Insulation Support for Cryogenic Multi-Pipeline in Double Temperature Zone

作　　者：艾丽斯佳[1] 胡石林[1] 储诚节[1] AI Lisijia;HU Shilin;CHU Chengjie(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《低温物理学报》2022年第3期173-180,共8页Low Temperature Physical Letters

摘　　要：本文以液氢温区下的双温区多管道为研究对象,对其进行了热流分析,建立了几何模型,采用有限元方法进行了热-结构耦合分析求解,分析了不同壁厚及不同支撑宽度下漏热、应力及形变的变化规律.研究结果表明:壁厚减小时,漏热值减少,绝热支撑总体应力增加,支撑形变增大;宽度减小时,20 K温区漏热量减少,80 K温区漏热增加,总漏热量减少,支撑应力增大,最大形变量增大.最终,针对某工程使用的双温区四管道,拟合出了壁厚与漏热、最大应力及最大形变量变化规律的曲线、方程,宽度与双温区漏热、最大应力及最大形变量变化规律的曲线、方程.在应力、漏热、形变量均允许的情况下,得出最薄壁厚可取到1.576 mm;在壁厚取为2 mm时,得出最小宽度可取为0.572 mm.In this paper,taking the double temperature zone multi-pipeline under the liquid hydrogen temperature zone as the research object,the heat flow analysis is carried out,the geometric model is established,the thermal structural coupling analysis is solved by the finite element method?and the variation laws of heat leakage9 stress and deformation under different wall thickness and support width are analyzed.The results show that when the wall thickness decreases,the heat leakage value decreases,the overall stress of the adiabatic support increases and the support deformation increases;When the width decreases the heat leakage in 20 K temperature zone decreases the heat leakage in 80 K temperature zone increases,the total heat leakage decreases,the support stress increases and the maximum deformation increases.Finally,for the double temperature zone four pipes used in a project9 the curves and equations of wall thickness and heat leakage,maximum stress and maximum deformation variable change law,and the curves and equations o￡width and heat leakage9 maximum stress and maximum deformation variable change law in double temperature zone are fitted.When the stress,heat leakage and deformation are allowed it is concluded that the thickness of the thinnest wall can be 1.576 mm;When the wall thickness is 2 mm,the minimum width can be 0.572 mm.

关 键 词：低温管道 绝热支撑 热-结构耦合 双温区多管道 数值模拟 

分 类 号：TB657[一般工业技术—制冷工程]