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Analytical study of the performance of pulse tube refrigerator with symmetry-nozzle

✍ Scribed by Luwei Yang; Zhou Yuan; Liang Jingtao; Zhu Wenxiu

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 148 KB
Volume: 39
Category: Article
ISSN: 0011-2275
DOI: 10.1016/s0011-2275(99)00094-6

No coin nor oath required. For personal study only.

✦ Synopsis

This paper analyzes the mechanism of the symmetry-nozzle instead of needle valve or ori®ce to improve the performance of pulse tube refrigerator in experiments. Their identi®cations are to result in a similar reciprocal movement in the hot end of the pulse tube; their dierences are that their ¯ow coecients have dierent characteristics. The ¯ow coecient of the symmetry-nozzle has a positive feedback to ¯ow rate while the ori®ce has little relation to ¯ow rate generally. Further analysis shows that this feature results in large refrigeration when the pressure ratio and mass ¯ow amount are same, which explains the reason for even lower temperature and a larger refrigeration amount when using the symmetry-nozzle.

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