新型脉管制冷法

New Type of Pulse Tube Refrigeration

脉管制冷机由于具有结构简单,可靠性高、寿命长等优势,近年来发展迅速。本文综述了脉管制冷法的发展及其结构多样化的特点,采用数值模拟方法,分析了基本型、小孔型,双向进气型、多路旁通型、双活塞型和四阀型脉管制冷机的制冷机理。指出脉管制冷的关键在于脉管中气体压力和流速相位的匹配。

Pulse tube refrigeration has been developed rapidly in recent years due to its simplicity and high reliability. The development and structure innovations of it are reviewed in this paper. The refrigeration mechanisms of several types of the pulse tube refrigerator have been analyzed by using the numerical simulation method. The results show that the phase shift between the dynamic pressure and velocity is the key of the pulse tube refrigeration.