Large eddy simulation of flow and heat transfer of the flat finned tube in direct air-cooled condensers

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	Large eddy simulation of flow and heat transfer of the flat finned tube in direct air-cooled condensers
	Wen, Juan; Tang, Dawei; Wang, Zhicheng; Zhang, Jing; Li, Yanjun
刊名	APPLIED THERMAL ENGINEERING
	2013-11-03
卷号	61 期号:2 页码:75-85
关键词	Large eddy simulation Flat finned-tube Vortex shedding Wake interaction Flow and heat transfer
英文摘要	The striking phenomenon during the flow past multiple wavy finned flat tubes is the generation of a complex flow structure as a consequence of the nonlinear interactions among the wakes behind the bodies. This study investigates the flow structures, heat transfer and vortex-shedding characteristics behind a single and two side-by-side flat finned-tubes at a gap ratio (spacing to diameter ratio) of 1.95. The three-dimensional numerical simulations are performed with the computational fluid dynamics code ANSYS FLUENT12.0 using large eddy simulation (LES) with the subgrid-scale model-Dynamic Smagorinsky-Lilly model. The instantaneous properties of velocity, temperature, pressure and vorticity are obtained and analyzed. In addition, the time history of drag and lift coefficients, local Nusselt number and skin friction coefficients are determined and discussed at various Reynolds numbers. Special attention is paid to investigate the effect of the Reynolds number on the vortex-shedding characteristics and the mutual interaction of the wakes behind the two side-by-side finned-tubes. A discussion on the mechanism of vortex-shedding and wake interaction behind the flat finned-tube and their effects on the thermal histories are presented. (C) 2013 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
关键词[WOS]	SIDE-BY-SIDE ; CIRCULAR-CYLINDER ; FLUID-FLOW ; TURBULENT ; BANK ; WAKE
收录类别	SCI
语种	英语
WOS记录号	WOS:000329081000009
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98829]
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	Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wen, Juan,Tang, Dawei,Wang, Zhicheng,et al. Large eddy simulation of flow and heat transfer of the flat finned tube in direct air-cooled condensers[J]. APPLIED THERMAL ENGINEERING,2013,61(2):75-85.
APA	Wen, Juan,Tang, Dawei,Wang, Zhicheng,Zhang, Jing,&Li, Yanjun.(2013).Large eddy simulation of flow and heat transfer of the flat finned tube in direct air-cooled condensers.APPLIED THERMAL ENGINEERING,61(2),75-85.
MLA	Wen, Juan,et al."Large eddy simulation of flow and heat transfer of the flat finned tube in direct air-cooled condensers".APPLIED THERMAL ENGINEERING 61.2(2013):75-85.