Spoke型超导腔非稳态降温过程模拟与热应力分析  

Unsteady simulation and thermal stress analysis of Spoke superconducting cavity in cool-down process

作　　者：朱柯宇 葛锐[1] 韩瑞雄[1] 李少鹏[1] 贺斐思 李梅[1] 常正则 Zhu Keyu;Ge Rui;Han Duanxiong;Li Shaopeng;He Feisi;Li Mei;Chang Zhengze(Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]中国科学院大学,北京100049

出　　处：《低温工程》2021年第1期15-22,共8页Cryogenics

基　　金：国家自然科学基金资助(No.12005237)。

摘　　要：Spoke型超导腔是一种用于中低β加速段的新型超导腔加速结构。使用数值计算方法研究了Spoke型超导腔在非稳态降温过程中的温度分布情况和降温规律,并以此为基础计算了降温过程中的热应力分布情况及其变化规律。结果表明,在降温过程中由于流动不均匀导致Spoke型超导腔温度分布产生了不均匀性,其不均匀程度在降温过程中呈现先迅速上升而后不断降低的趋势。计算了在非稳态降温过程中5个点的应力,通过计算得知,Spoke型超导腔最大热应力远大于稳态工况,最大可达41.85倍。在降温过程中这五个点的超导腔热应力呈现先增大后减小的趋势,且增大降温速率,应力的最大值会随之增大。The Spoke superconducting cavity,as an acceleration structure,is a new type of superconducting cavity used in the middle and lowβacceleration region.In this paper,the numerical calculation method was used to study the temperature distribution of the spoke superconducting cavity in the unsteady cool-down process.Furthermore the thermal stress distribution and its variation of the process were calculated.As a result,the temperature distribution of the Spoke superconducting cavity is non-uniform due to the non-uniformity of the flow during the cool-down process,and the degree of the non-uniformity increases rapidly at first and then decreases continuously.During the unsteady cool-down process,the thermal stress of 5 points on the superconducting cavity were calculated,the maximum of thermal stress of the Spoke superconducting cavity is 41.85 times of the pressure in the steady state condition.The thermal stress of the 5 points increases first at then decreases,and the maximum stress increases with the increase of the cooling rate.

关 键 词：Spoke型超导腔 数值计算 非稳态降温 热应力 

分 类 号：TL53[核科学技术—核技术及应用] TB61[一般工业技术—制冷工程]