| 液氦温区两级4K脉冲管制冷机数值模拟 |
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| 引用本文： | 巨永林. 液氦温区两级4K脉冲管制冷机数值模拟[J]. 工程热物理学报, 2003, 24(1): 25-27 |
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| 作者姓名： | 巨永林 |
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| 作者单位： | 1. 中国科学院理化技术研究所低温中心,北京,100080
2. Department of Physics Eindhoven University of Technology,the Netherlands |
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| 基金项目： | 国家自然科学基金资助项目(No.50176052) |
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| 摘 要： | 为模拟和动态显示工作在液氦温区的两级4K脉冲管制冷机内部工作过程和参数变化规律,发展了一种新的欧拉法-拉格朗日法数值计算模型。采用拉格朗日方法,直接跟踪脉冲管中气体微元随周期性压力波动的具体运行轨迹;采用欧拉法,直接模拟蓄冷器内部的动态参数变化。本文简单介绍该模型,并模拟了一典型两级4 K脉冲管制冷机各参数的变化情况,分析了多层磁性蓄冷材料对制冷机性能的影响情况。
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| 关 键 词： | 脉冲管制冷机 两级 液氦温度 数值模拟 |
| 文章编号： | 0253-231X(2003)01-0025-03 |
| 修稿时间： | 2002-01-29 |
NUMERICAL STUDY OF A TWO-STAGE 4K-PULSE TUBE CRYOCOOLER OPERATING AT LIQUID HELIUM TEMPERATURE RANGE |
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| DE WAELE A.T.A.M. NUMERICAL STUDY OF A TWO-STAGE 4K-PULSE TUBE CRYOCOOLER OPERATING AT LIQUID HELIUM TEMPERATURE RANGE[J]. Journal of Engineering Thermophysics, 2003, 24(1): 25-27 |
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| Authors: | DE WAELE A.T.A.M |
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| Abstract: | A new mixed Eulerian-Lagrangian computational model for simulating and visualizing the internal processes and the variations of dynamic parameters of a two-stage 4 K pulse tube cryocooler has been developed. We use the Lagrangian method, a moving grid, to follow the exact tracks of gas particles as they move with pressure oscillation in the pulse tube to avoid any numerical false diffusion. The Eulerian approach, a fixed computational grid, is used to simulate the variations of dynamic parameters in the regenerator. The time-variations of dynamic parameters are calculated in the paper. Attention is paid to the effects of different regenerative materials on the performance of the 4 K two-stage pulse tube cooler. |
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| Keywords: | pulse tube cryocooler two-stage liquid helium numerical study |
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