单级高频脉冲管制冷机研究

SINGLE STAGE HIGH FREQUENCY PULSE TUBE COOLER WITH BASE TEMPERATURE BELOW 30 K

采用单级高频脉冲管制冷机获得低于30 K的制冷温度是脉冲管应用的一个新方向。本文介绍了一套获得了26 K最低制冷温度的单级高频脉冲管制冷机,这是无多路旁通的单级高频脉冲管制冷机获得的最低温度。实验表明,即使对于惯性管作为主要调相结构的高频情况,双向进气方案在进一步调相和降低温度方面仍有很大作用。该工作为单级高频脉冲管制冷机在30-40 K温区的应用奠定了基础。该实验结果和模拟分析结果基本相符。通过和二级制冷机的比较说明了单级制冷机的优势,即较大的制冷量斜率。

Using single stage version PTC to reach the temperature below 30 K is a difficult task for high frequency pulse tube cooler. This paper introducs the performance of a single stage high frequency pulse tube cooler, which has reached the lowest temperature of 26 K, this is the reported lowest temperature for single-stage higher frequency PTC without multi-bypass. The simulation results are acquired and compared with the experimental results, both are coincide generally. The main advantage of single stage PTC is the high slope of Q,c.vs.Tc, this is shown through comparison with two stage PTC.