多孔塞相分离器是空间远红外探测器冷却系统中的关键部件，可有效防止超流氦的泄漏，延长探测器的工作寿命。本文运用超流氦二流体模型和Hagen—Poiseuille定律等对多孔塞相分离器流量特性进行了理论分析，并针对不同厚度和渗透率的多孔塞进行了计算结果和实验结果的对比与分析。由此得到了通过多孔塞相分离器的质量流量随温差的变化规律，并对多孔塞渗透率、厚度和氦浴温度等因素对相分离器流量特性的影响进行了研究。
Porous plug phase separator is a crucial part of the cryogenic system of space instrument like infrared detector. It can effectively prevent the leakage of superfluid helium to outer space and prolong service lifetime of the detector. Theoretical analysis of flow characteristic for porous plug separator was carried out in this study by applying two-fluid model of superfluid helium and the Hagen-Poiseuille law. The calculated and experimental results of porous plugs under different thickness and permeability were also compared and discussed. The variation of mass flow rate with temperature difference for porous plug was obtained, and the effects of permeability, thickness and helium bath temperature on mass flow rate were discussed as well.
参考文献
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