Start-up and steady thermal oscillation of a pulsating heat pipe

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	Start-up and steady thermal oscillation of a pulsating heat pipe
	Xu, JL; Zhang, XM
刊名	heat and mass transfer
	2005-06-01
卷号	41 期号:8 页码:685-694
英文摘要	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.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	thermodynamics ; mechanics
研究领域[WOS]	thermodynamics ; mechanics
收录类别	SCI
语种	英语
WOS记录号	WOS:000229505800003
内容类型	期刊论文
源URL	[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
推荐引用方式 GB/T 7714	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.