高温惯性管在脉管制冷机中的应用探究

Investigation on the High-temperature Inertance Tube in a Pulse Tube Refrigerator

利用热声理论分析了惯性管内气体温度变化时,纯阻抗、感抗和容抗的变化情况。模拟分析了高温和常温条件下,惯性管的调相能力。基于一台50 W@180 K脉冲管制冷机,分别采用高温惯性管和常温惯性管作为调相机构,研究其制冷性能及各部件的损失。对其进行实验验证,结果表明通过选择合适的惯性管长度,采用高温惯性管可以达到和常温惯性管一致的制冷性能。

The effects of gas temperature in an inertance tube on resistance, inertance and compliance are analyzed by thermoacoustic theory. Phase shift ability of high-temperature inertance tube （HTIT） and room-temperature inertance tube （RTIT） is studied by using simulation. Based on a 50 W@180 K pulse tube refrigerator, a HTIT and a RTIT is used as the phase shifter, respectively, and the cooling performance and losses in some components are investigated. An experiment is carried out to verify the calculated results. The HTIT and CTIT show an agreement in cooling performance by adjusting the length of the inertance tube.