液氦温区VM-PT制冷机的数值计算研究

发布时间：2018-05-11 11:32

  本文选题：液氦温区 + VM制冷机　； 参考：《工程热物理学报》2017年04期

【摘要】：本文对液氦温区Vuilleumier耦合脉冲管(VM-PT)制冷机进行了数值计算研究。为了减小来自室温的漏热,将气库置于一级冷头之上。采用SAGE软件建立了数值计算模型,以无负荷制冷温度为目标函数对制冷机运行参数进行了优化。为了进一步了解制冷机的工作原理,研究了脉冲管制冷机内焓流、声功、熵流、压力波、体积流率及温度的沿程分布,并对其相位关系和可用能损失进行了分析。计算结果表明,该制冷机可在平均压力0.9 MPa、压比1.61、运行频率0.8Hz时得到3.69 K的无负荷制冷温度,在4.2 K时可提供16.24 mW制冷量。
[Abstract]:In this paper, the numerical calculation of Vuilleumier coupled pulse tube (VM-PTT) refrigerator in liquid helium temperature region has been carried out. In order to reduce heat leakage from room temperature, the gas reservoir is placed on the first stage cold head. The numerical calculation model was established by using SAGE software, and the operating parameters of the refrigerator were optimized by taking the temperature of no-load refrigeration as the objective function. In order to further understand the working principle of the refrigerator, the distribution of enthalpy flow, acoustic work, entropy flow, pressure wave, volume flow rate and temperature in the pulse tube refrigerator is studied, and the phase relationship and available energy loss are analyzed. The calculated results show that the refrigerator can obtain a load free refrigeration temperature of 3.69 K at an average pressure of 0.9 MPA, a pressure ratio of 1.61 and a frequency of 0.8Hz, and a cooling capacity of 16.24 MW at 4.2 K.
【作者单位】： 中国科学院低温工程学重点实验室(理化技术研究所);中国科学院大学;
【基金】：国家自然科学基金资助项目(No.51276188;No.51427806) 博士后创新人才支持计划资助项目(No.BX201600173)
【分类号】：TB651
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本文编号：1873771