Compared with double inlet type two-stage pulse tube refrigerator, step displacer type has higher efficiency. The step displacer has two functions, input power distribution function and phase shifting function, which are fundamental issues of this type refrigerator. The two functions are discussed by an ideal model, and are investigated by a numerical simulation. Theoretically, the exergy flow ratio to the first stage over the second stage depends on the refrigeration temperature ratio and step ratio, the dead volume at the hot end of the pulse tube can be an additional parameter for adjusting the phase angle difference at the cold end of the regenerator.

中文翻译：

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步进式两级脉冲管制冷机的输入功率分配和移相器功能基础

与双入口式两级脉冲管制冷机相比，阶梯式移位机具有更高的效率。步进式移位器具有两个功能，即输入功率分配功能和相移功能，这是这种冰箱的基本问题。通过理想模型讨论了这两个函数，并通过数值模拟对其进行了研究。从理论上讲，第一级到第二级的火用流量比取决于制冷温度比和步进比，脉冲管热端的死体积可以作为调节冷端相角差的附加参数再生器。