冷冻靶系统中半腔式与全腔式TMP的温控特性数值研究  

Numerical Comparisons of Temperature-controlling Characteristics between Semi-and Holo-TMP Structures in Cryotarget System

作　　者：郭富城 厉彦忠[1] 李翠[1] Guo Fucheng;Li Yanzhong;Li Cui(School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an,710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《制冷学报》2023年第1期81-87,共7页Journal of Refrigeration

基　　金：国家自然科学基金(52176021)资助项目。

摘　　要：在惯性约束核聚变实验中,为了保证良好的温控效果,TMP套筒上的温度分布需要良好地映射至金腔表面。本文分别对半腔式和全腔式TMP进行数值仿真,研究了氦气压力、凸环宽度和加热带功率等因素对TMP温控效果的影响。结果表明:在相同热边界载荷下,相比于全腔式TMP,半腔式TMP可以实现更大的温度调控范围,具有更好的温控效果;增加腔内氦气压力在一定程度上可以改善TMP的温控效果,但改善程度很小;增设凸环可以明显改善TMP温控效果,且随着凸环宽度的增大,TMP的温控效果随之增强;随着加热带功率的增大,半腔式和全腔式TMP内的金腔内表面最大温差的增速分别为0.38、0.25 K/W,表明半腔式TMP对加热带功率变化更加敏感,具有更好的温控效果。The temperature-controlling characteristics of a thermal mechanical package(TMP)are crucial to the experiments in inertial confinement fusion.This study addresses the semi-and holo-TMP structures.The influences of relative factors,including the pressure of helium inside the hohlraum,width of bulge loops,and power of heat rings,on the temperature-controlling characteristics of TMP are investigated systematically.The results show that a semi-TMP structure has a better temperature-control performance than a holo-structure under the same thermal conditions.Increasing the pressure of helium makes a positive but limited contribution to the TMP temperature-control effect.The presence of bulge loops enhances the heat transfer between the TMP and gold hohlraum,thereby improving the temperature-control performance.In addition,the widths of the bulge loops slightly improve the temperature-controlling effect.The temperature response of the gold hohlraum to variations in the heat ring power exhibits clear differences between the semi-and holo-TMP structures.As the heating power increases,the maximum temperature difference of the gold hohlraum increases linearly at a rate of 0.38 K/W and 0.25 K/W for the semi-and the holo-TMP structures,respectively,which indicates a better temperature-controlling effect on the semi-TMP structure.

关 键 词：惯性约束核聚变 冷冻靶 温控特性 数值模拟 

分 类 号：TB611[一般工业技术—制冷工程] TL632[核科学技术—核技术及应用]