为提高超流氦系统负压低温板翅式换热器的流动及换热性能
结合传统波纹翅片和锯齿翅片提出一种新型波纹-锯齿翅片
并提出将锯齿密度作为一个新的结构参数对新型翅片进行描述。采用数值模拟的方法
分别研究分析了波纹-锯齿翅片通道内流动换热物理场
并与传统翅片进行了对比。结果表明:相较于传统的波纹翅片和锯齿翅片
波纹-锯齿翅片的传热因子j分别提升19.97%~38.22%和25.09%~33.83%
且在低雷诺数时性能提升更加明显;j随波长、锯齿密度的增大而减小
随双波高的增大而增大;摩擦因子f随波长的增大而减小
随双波高的增大而增大
且随锯齿密度的增加呈先增大后减小的变化趋势。新型翅片提高了换热及综合性能
该研究结果可为负压低温板翅式换热器的优化设计提供参考。
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School of Energy and Power Engineering, Beihang University, Beijing 100191, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,School of Energy and Power Engineering, Beihang University, Beijing 100191, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.Design optimization, construction and testing of 2 K Joule-Thomson heat exchanger for a superfluid helium cryogenic system[J].Applied Thermal Engineering,2020.
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