Analysis on the heat transfer characteristics of a micro-channel type porous-sheets Stirling regenerator

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	Analysis on the heat transfer characteristics of a micro-channel type porous-sheets Stirling regenerator
	Li, Zhigang 1; Haramura, Yoshihiko 2; Tang, Dawei 1; Guo, Chaohong 1
刊名	INTERNATIONAL JOURNAL OF THERMAL SCIENCES
	2015-08-01
卷号	94 页码:37-49
关键词	Stirling engine Porous-sheets regenerator Micro-channel Heat transfer characteristics Analytical solution Dynamic mesh computational fluid dynamics
英文摘要	To avoid the high flow frictional loss associated with conventional wire mesh Stirling regenerators, a micro-channel type stacked porous-sheets Stirling regenerator is investigated. An analytical solution is derived for the transient heat transfer characteristics of the fully developed reciprocating laminar flow under prescribed wall temperature profiles. The complex Nusselt number (Nu) is expressed as a function of kinetic Reynolds number (Re-omega) and Prandtl number (Pr). At low Re of less than 10, the real part of Nu has an almost constant value of 6.0, approximately equal to the known real-valued Nu for the fully developed unidirectional laminar flow under constant wall heat flux, while the imaginary part is negligible, thus "scaling effect" can be utilized to enhance heat transfer. At higher Re-omega both the real and imaginary parts of Nu increase with the increase of Re and Pr, and the phase shift between the temperature difference and the heat flux gradually increases and approaches 45 degrees. Approximate analytical solutions are also deduced for the entrance region from the integral boundary layer equations in both cases of "Thermally developing flow" and "Simultaneously developing flow". The heat transfer is enhanced in the entrance region and the local Nu in the flow direction approaches the corresponding values of fully developed flow. The analytical results are confirmed by dynamic mesh CFD results, and the obtained Nu similar to Re-omega data and patterns generally agree with available analytical and experimental data from published literatures. Application of the analytical results to the design and optimization of Stirling regenerator are also shown. (C) 2015 Elsevier Masson SAS. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Engineering, Mechanical
研究领域[WOS]	Thermodynamics ; Engineering
关键词[WOS]	OSCILLATING FLOW ; ENGINE ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000355029000005
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98910]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Kanagawa Univ, Dept Mech Engn, Yokohama, Kanagawa 2218686, Japan
推荐引用方式 GB/T 7714	Li, Zhigang,Haramura, Yoshihiko,Tang, Dawei,et al. Analysis on the heat transfer characteristics of a micro-channel type porous-sheets Stirling regenerator[J]. INTERNATIONAL JOURNAL OF THERMAL SCIENCES,2015,94:37-49.
APA	Li, Zhigang,Haramura, Yoshihiko,Tang, Dawei,&Guo, Chaohong.(2015).Analysis on the heat transfer characteristics of a micro-channel type porous-sheets Stirling regenerator.INTERNATIONAL JOURNAL OF THERMAL SCIENCES,94,37-49.
MLA	Li, Zhigang,et al."Analysis on the heat transfer characteristics of a micro-channel type porous-sheets Stirling regenerator".INTERNATIONAL JOURNAL OF THERMAL SCIENCES 94(2015):37-49.