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Start-up and steady thermal oscillation of a pulsating heat pipe
Xu, JL; Zhang, XM
2005-06-01
发表期刊HEAT AND MASS TRANSFER
卷号41期号:8页码:685-694
摘要As a novel electronic cooling device, pulsating heat pipes (PHPs) have been received attention in recent years. However, literature survey shows that no studies were carried out on the start-up and steady thermal oscillation of the PHPs. In the present paper, the copper capillary tube was being bended to form the snake-shaped PHP. Heating power was applied on the heating section, and transferred to the condensation section and dissipated to the environment by the pure natural convection. The inside diameter of the capillary tube is 2.0 mm and the working fluid is selected as FC-72. A high speed data acquisition system was used to detect the start-up and steady thermal oscillation of the PHP. Two types of the start-up process were observed: a sensible heat receiving start-up process accompanying an apparent temperature overshoot followed by the steady thermal oscillation at low heating power, and a smooth sensible heat receiving start-up process incorporating a smooth oscillation period at high heating power. For the steady thermal oscillation, also two types were found: the random thermal oscillation with a wide frequency range, indicating the random distribution of the vapor plug and liquid slug inside the capillary tube at low heating power, and the quasi periodic thermal oscillation with the same characteristic frequency for both heating section and condensation section, indicating the uniform distribution of the vapor plug and liquid slug inside the capillary tube at high heating power. The power spectral density (PSD) was used to analyze the thermal oscillation waves. The frequency corresponds to the time that a couple of adjacent vapor plug and liquid slug passing through a specific wall surface.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1007/s00231-004-0535-3
研究领域[WOS]Thermodynamics ; Mechanics
收录类别SCI
语种英语
WOS类目Thermodynamics ; Mechanics
WOS记录号WOS:000229505800003
引用统计
被引频次:49[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10236
专题中国科学院广州能源研究所
作者单位Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
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Xu, JL,Zhang, XM. Start-up and steady thermal oscillation of a pulsating heat pipe[J]. HEAT AND MASS TRANSFER,2005,41(8):685-694.
APA Xu, JL,&Zhang, XM.(2005).Start-up and steady thermal oscillation of a pulsating heat pipe.HEAT AND MASS TRANSFER,41(8),685-694.
MLA Xu, JL,et al."Start-up and steady thermal oscillation of a pulsating heat pipe".HEAT AND MASS TRANSFER 41.8(2005):685-694.
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