| 汤逸豪， 李瑛， 刘少帅， 蒋珍华， 向振之， 董彩倩， 刘莉.液氦温区JT制冷机套管换热器性能研究[J].轻工机械,2019,37(2):45-51 |
| 液氦温区JT制冷机套管换热器性能研究 |
| Performance of Tube in Tube Heat Exchanger in JT Cryocooler at Liquid Helium Temperature Zone |
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| DOI：10.3969/j.issn.1005 2895.2019.02.009 |
| 中文关键词: 套管换热器 液氦温区 标准k ε湍流模型 SIMPLE算法 |
| 英文关键词:tube in tube heat exchanger liquid helium temperature standard k ε turbulence model SIMPLE algorithm |
| 基金项目:国家自然科学基金项目（51806231）；上海市自然科学基金（18ZR1445600）；中国博士后科学基金资助项目
（2018M630476）。 |
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| 中文摘要: |
| 为了提高液氦温区JT制冷机的工作效率，对液氦温区JT制冷机用套管换热器开展研究。基于理论计算研究了结构尺寸和螺
旋半径对液氦温区套管换热器效率及对液氦温区制冷量的影响。采用标准k ε湍流模型，压力速度耦合使用SIMPLE算法构建套管换热器数值计算模型，分析
内外管内氦气工质温度分布情况。结果表明：在换热器压降较小时，减小管径和螺旋半径可以增大液氦温区套管换热器总换热系数，增大换热效率，提高JT制冷
机整机性能。该研究可为液氦温区JT制冷机套管换热器的设计提供参考依据。 |
| 英文摘要: |
| Studies on the tube in tube heat exchangers (THXs) in JT cryocooler at liquid helium temperature zone were carried out to improve working
efficiency of the cryocooler. Based on the theoretical calculations, the effects of structural size and spiral radius on the efficiency of the THXs and the cooling capacity in the liquid helium
temperature zone were analyzed. The numerical calculation model of the THXs was established by using the standard k ε turbulence model and SIMPLE algorithm with pressure
velocity coupling. The temperature distribution of the inner and outer tubes of the THXs was analyzed.The results show that while the pressure drop of the THXs is small, the overall heat
transfer coefficient of the THXs can be increased by reducing the pipe diameter and the spiral radius. Furthermore, the study can provide reference for the design of JT cryocooler THXs in
liquid helium temperature zone. |
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