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High speed flow visualization of a closed loop pulsating heat pipe
Xu, JL; Li, Y; Wong, TN
2005-07-01
发表期刊INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷号48期号:16页码:3338-3351
摘要We provide the high speed flow visualization results for the closed loop pulsating heat pipes (PHPs). It is identified that there exists the bulk circulation flow which lasts longer and the local flow direction switch flow. The bubble displacements and velocities do display the sine oscillation waves but the local oscillation waves were superimposed with short periods and small oscillation amplitudes. Distinct with the methanol PHP, the water PHP has quasi-rectangular shape for the bubble displacements, behaving the periodic stationary-fast movement characteristics. Dispersed bubbles, vapor plugs and the transition flow patterns from the dispersed bubbles to the vapor plugs are the major flow patterns in PHP. Long vapor plugs are only observed for the methanol PHP, not observed in the water PHP, due to the vapor plug deformation and breakup mechanism, which was analyzed in the present paper. Bubble sizes have quasi-fixed distributions versus time over the entire PHP, but have unsymmetry distributions among various tubes. The complicated combined effects of bubble nucleation, coalescence and condensation are responsible for the oscillation flow in PHP. (c) 2005 Elsevier Ltd. All rights reserved.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijheatmasstransfer.2005.02.034
研究领域[WOS]Thermodynamics ; Engineering ; Mechanics
关键词[WOS]SLUG FLOW ; LIQUID
收录类别SCI
语种英语
WOS类目Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS记录号WOS:000229918300008
引用统计
被引频次:101[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/344007/10233
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Nanyang Technol Univ, Sch Mech & Prod Engn, Nanyang 639798, Singapore
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Xu, JL,Li, Y,Wong, TN. High speed flow visualization of a closed loop pulsating heat pipe[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2005,48(16):3338-3351.
APA Xu, JL,Li, Y,&Wong, TN.(2005).High speed flow visualization of a closed loop pulsating heat pipe.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,48(16),3338-3351.
MLA Xu, JL,et al."High speed flow visualization of a closed loop pulsating heat pipe".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 48.16(2005):3338-3351.
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