Numerical Study on the Performance Sensitivity of a Pulse Tube Cryocooler with Active Phase Shifter
Numerical Study on the Performance Sensitivity of a Pulse Tube Cryocooler with Active Phase Shifter
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DOI：
10.1088/1757-899x/502/1/012018
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
K. Liang;A. Abolghasemi;C. Stone;M. Dadd;P. Bailey
中科院分区：
文献类型：
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作者：
K. Liang;A. Abolghasemi;C. Stone;M. Dadd;P. Bailey
脉管制冷机在红外传感器、超导和气体液化等领域有着广泛的应用。有源移相器允许压力和质量流率之间的相位角变化，因此可以实现高效率和更好的性能。本文采用动态网格技术对一台带主动移相器的直列式脉管制冷机的振荡流场和性能灵敏度进行了数值模拟。高性能计算机（HPC）用于2D模拟。研究了相位角、工作频率、压力降和填充压力等因素的影响。脉冲管制冷机似乎有一个最佳的工作频率（55赫兹）和位移相位角（40度）之间的压缩机和置换。28 bar的填充压力导致比24 bar和20 bar更好的性能。一台直列式脉管制冷机样机的实验结果验证了CFD计算结果的正确性。
Pulse tube cryocoolers have been widely used for cooling infrared sensors, superconducting and gas liquefaction. An active phase shifter allows the phase angle between the pressure and the mass flow rate to be varied, thus high efficiency and better performance can be achieved. In this work, a CFD technique using dynamic meshing was adopted to investigate the oscillating flow and performance sensitivity of an in-line pulse tube cryocooler with an active phase shifter. A high performance computer (HPC) was used for the 2D simulation. The effect of phase angle, operating frequency, pressure drop, and fill pressure were studied. The pulse tube cryocooler appears to have an optimal operating frequency (55 Hz) and displacement phase angle (40 deg) between compressor and displacer. A fill pressure of 28 bar leads to better performance than 24 bar and 20 bar. The CFD results are validated by the experimental results of a prototype in-line pulse tube cryocooler.