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 changes of the pure impedance, the inductive reactance and the capacitive reactance were analyzed by the thermoacoustic theory when the gas temperature in the inertial tube was changed. Simulation analysis of high temperature and room temperature conditions, the phase modulation ability of the inertial tube. Based on a 50 W @ 180 K pulse tube refrigerator, a high-temperature inertial tube and a normal-temperature inertial tube were used as the phase modulation mechanism to study the refrigeration performance and loss of each component. Experimental results show that by choosing the appropriate length of the inertia tube, the high temperature inertial tube can achieve the same refrigeration performance as the normal temperature inertial tube.