CFD simulation analysis and visualization experimental study of gas contamination condensation distribution in coaxial pulse tube cryocooler

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-10 DOI:10.1016/j.ijrefrig.2025.03.016

Jinghao Ma , Bo Shao , Peng Zhao , Zhenhua Jiang , Shaoshuai Liu , Deping Dong

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引用次数: 0

Abstract

Condensable gas contamination is one of important factors limiting the longevity of pulse tube coolers. To further understand the way in which contamination affect the performance of pulse tube cooler, the behavioral characteristics of the contamination inside the pulse tube cooler were investigated. In this study, a 2-D simulation model of the regenerator was developed, and the diffusion and phase change distribution characteristics of the contamination at the cold end were investigated by CFD method. The transition of gas flow and pressure loss caused by the contamination were analyzed. The results show that condensation occurs first in the pulse tube and distribute mainly in the pulse tube and the regenerator eventually. The transition of the gas flow state due to the accumulation of contamination is likely to be an important cause of degradation in the performance of pulse tube cooler. And contamination will accumulate in the flow straightener when the cooling temperature closer to the saturation temperature, which can further affect the state of gas flow in the pulse tube, resulting in higher pressure losses. In addition, based on the technology of neutron radiography, a visualization experiment on the accumulation of contamination in pulse tube cooler was completed, and the experimental results were compared with the simulation results.

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.