变截面脉管制冷机的实验研究

Experimental Research of Non-Uniform Cross-Sectional Pulse Tube Refrigerator

为了更好地提高脉管制冷机的制冷效率和制冷量 ,降低制冷温度 ,对变截面新型结构的脉管制冷机进行了实验研究和分析 .实验结果表明 ,对于实验所用的脉管制冷机 ,在外部条件和系统其他结构均不变的情况下 ,当系统压力为 1 2MPa ,最佳频率为 14Hz时 ,变截面脉管比等截面脉管获得的低温低 30K ,证明了变截面脉管制冷机的性能比等截面脉管制冷机的性能优越 .

In order to improve the performance of pulse tube refrigerator(PTR), a new kind of PTR which is characterized by non-uniform cross-sectional area was proposed. Experiments show that lower cooling temperature can be reached by the new type PTR compared with that of the PTR of constant cross-sectional of area.