频率对热耦合两级脉管制冷机重力效应影响研究  

Research on influence of frequency on gravity effect of a two-stage thermal-coupled pulse tube cryocooler

作　　者：陈振曜 殷旺 惠贺军 杨伟业 吴亦农[1,2,3] 蒋珍华 丁磊[2] 刘少帅 Chen Zhenyao;Yin Wang;Hui Hejun;Yang Weiye;Wu Yinong;Jiang Zhenhua;Ding Lei;Liu Shaoshuai(School of Information Science and Technology,Shanghai Tech University,Shanghai 201210,China;Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]上海科技大学信息科学与技术学院,上海201210 [2]中国科学院上海技术物理研究所,上海200083 [3]中国科学院大学,北京100049

出　　处：《低温工程》2025年第2期61-66,共6页Cryogenics

基　　金：国家自然科学基金资助项目(51806231);上海市自然科学基金资助项目(24ZR1476200)。

摘　　要：为了削弱脉管制冷机在不同重力方向下因冷热端温差导致的自然对流问题,探究频率对制冷机重力效应的影响。基于二维CFD模拟了各角度下不同频率的脉冲管内部温度场的及相位的变化,并通过实验验证了不同角度及频率下制冷机制冷温度的变化。结果表明:脉管制冷机在不同频率下运行时,分别在冷端朝向角为120°和150°时展现出最差的制冷性能。随着运行频率的增大,高频压力波对自然对流抑制作用逐渐凸显,重力方向变化对于脉管制冷机的影响减弱。增大制冷机运行频率可部分削弱重力效应对制冷机性能影响。To weaken the natural convection caused by temperature difference between the cold end and hot end of pulse tube under different gravity directions,research on influence of op-erating frequency on gravity effects was conducted.Two-dimensional CFD simulations were con-ducted to analyze temperature field variations and phase shifts in pulse tube at different angles and frequency.Experimental validation was performed to investigate cooling temperature variations un-der different directions and frequency.The results showed that the cryocooler operating at different frequency respectively exhibited the worst performance at 120°and 150°cold-end direction.As the operating frequency increased,the inhibitory effect of high-frequency pressure waves on natural convection became more pronounced,while the impact of gravity direction on cryocooler perform-ance was reduced.Increasing the operating frequency can partially weaken the gravity effect.

关 键 词：脉管制冷机 热耦合 自然对流 CFD 重力方向 空间应用 

分 类 号：TB651[一般工业技术—制冷工程]