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高频脉冲管制冷机的蓄冷器源汇模型、流动模拟和参数优化

张珍 李家春

张珍, 李家春. 高频脉冲管制冷机的蓄冷器源汇模型、流动模拟和参数优化[J]. 力学学报, 2017, 49(2): 421-430. doi: 10.6052/0459-1879-16-287
引用本文: 张珍, 李家春. 高频脉冲管制冷机的蓄冷器源汇模型、流动模拟和参数优化[J]. 力学学报, 2017, 49(2): 421-430. doi: 10.6052/0459-1879-16-287
Zhang Zhen, Li Jiachun. NEW SOURCE/SINK MODEL, FLOW SIMULATION AND PARAMETER OPTIMIZATION OF THE REGENERATOR FOR HIGH FREQUENCY PULSE TUBE REFRIGERATOR[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(2): 421-430. doi: 10.6052/0459-1879-16-287
Citation: Zhang Zhen, Li Jiachun. NEW SOURCE/SINK MODEL, FLOW SIMULATION AND PARAMETER OPTIMIZATION OF THE REGENERATOR FOR HIGH FREQUENCY PULSE TUBE REFRIGERATOR[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(2): 421-430. doi: 10.6052/0459-1879-16-287

高频脉冲管制冷机的蓄冷器源汇模型、流动模拟和参数优化

doi: 10.6052/0459-1879-16-287
基金项目: 

国家自然科学基金资助项目 50890182

国家自然科学基金资助项目 11302234

详细信息
    通讯作者:

    2) 李家春, 院士, 研究员, 主要研究方向:环境流体力学.E-mail:jcli05@imech.ac.cn

  • 中图分类号: TB61+1

NEW SOURCE/SINK MODEL, FLOW SIMULATION AND PARAMETER OPTIMIZATION OF THE REGENERATOR FOR HIGH FREQUENCY PULSE TUBE REFRIGERATOR

  • 摘要: 蓄冷器是脉冲管制冷机的一个关键部件,其工作性能将直接影响整机性能.针对工质在蓄冷器内交变流动的特性,提出了一个新的源/汇项模型来模拟蓄冷器内的流动与换热,同时模型也考虑了气固间的非热平衡.对于蓄冷器和换热器内的固体填料,在一些假定条件的基础上推导得到了固体物质的温度分布的解析解.该模型不需要建立固体的能量方程,减小了计算的工作量,避免了达西定律在高频下不适用的限制条件,并针对交变流动情况下对流换热系数的取值提出了解决方法.新模型的计算结果与实验结果符合良好,验证了模型的可靠性.进一步应用此模型分析了蓄冷器内部的热交换和制冷机理,并进行了蓄冷器的优化设计,对于不同目数,不同丝径,不同材料的丝网,进行了各种情况下蓄冷器的换热性能优化分析.

     

  • 图  1  丝网结构示意图

    Figure  1.  Schematic diagram of wire screen

    图  2  频率对丝网表面处温度幅值的影响

    Figure  2.  Effect of frequency on the temperature amplitude at the surface of the wire screen

    图  3  板叠内各处的温度分布情况

    Figure  3.  Temperature distribution within the inner plate stack

    图  4  不同材质板叠表面处的温度变化

    Figure  4.  Temperature change at the surface of plate stack with different materials

    图  5  惯性管型脉冲管制冷机系统示意图 (1压缩机;2水冷器;3蓄冷器;4冷端换热器;5脉冲管;6热端换热器;7惯性管;8气库)

    Figure  5.  Schematic diagram of ITPTR: (1) compressor, (2) water chilling heat exchanger, (3) regenerator, (4) cold end heat exchanger, (5) pulse tube, (6) hot end heat exchanger, (7) inertance tube, (8) gas reservoir

    图  6  CHX最低温度的实验结果与计算结果比较

    Figure  6.  Comparison of the temperature of CHX between experimental and numerical results

    图  7  CHX最低温度的实验结果与计算结果比较

    Figure  7.  Comparison of the temperature of CHX between experimental and numerical results

    图  8  丝网目数对制冷量的影响

    Figure  8.  The effect of mesh number on cooling capacity

    图  9  丝网直径对制冷量的影响

    Figure  9.  The effect of wire diameter on cooling capacity

    图  10  不同回热器的回热损失率

    Figure  10.  The regenerative loss rate with different parameters

    图  11  制冷机最低温度和蓄冷器内单位质量工质单位时间内的换热量随频率的变化

    Figure  11.  Variations of the minimum temperature and heat transfer per unit time and mass with frequency

    图  12  制冷机和WHX入口端相位角随HHX出口端相位角的变化

    Figure  12.  Variations of cooling capacity and phase angle at the inlet of WHX with the phase angle

    表  1  惯性管型脉冲管制冷机各部件尺寸

    Table  1.   Dimensions of ITPTR

    表  2  回热器计算所用丝网的参数[34]

    Table  2.   The parameters of mesh matrix for the different regenerator[34]

    表  3  不同热物性参数下的热穿透深度和制冷量

    Table  3.   Heat penetration and cooling capacity at different thermal-physical properties

    表  4  不同回热器的参数

    Table  4.   Regenerator with different parameters

    表  5  不同频率蓄冷器内单位质量工质的周期换热量

    Table  5.   Heat exchange per cycle of unit mass working gas under different frequencies in regenerator

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出版历程
  • 收稿日期:  2016-10-17
  • 网络出版日期:  2017-01-09
  • 刊出日期:  2017-03-18

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