Heat transfer characteristic of longitudinal externally-finned tube in closed space

doi:10.3969/j.issn.0438-1157.2013.07.014

CIESC Journal ›› 2013, Vol. 64 ›› Issue (7): 2405-2410.DOI: 10.3969/j.issn.0438-1157.2013.07.014

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Heat transfer characteristic of longitudinal externally-finned tube in closed space

QIU Yan, TIAN Maocheng, LENG Xueli

School of Energy & Power Engineering, Shandong University, Jinan 250061, Shandong, China

Received:2012-11-08 Revised:2013-01-09 Online:2013-07-05 Published:2013-07-05
Supported by:
supported by the National Basic Research Program of China (2007CB206903)and the Science and Technology Project of Shandong Province (2008GG10007009).

封闭空间内纵向外翅片管结构参数对传热的影响

邱燕, 田茂诚, 冷学礼

山东大学能源与动力工程学院, 山东济南 250061

通讯作者: 田茂诚
作者简介:邱燕(1975- ),女,博士,副教授。
基金资助:
国家重点基础研究发展计划项目(2007CB206903);山东省科技攻关项目 (2008GG10007009)。

Abstract

Abstract: A three-dimensional numerical study was carried out to investigate effects of fin angle,fin length,and tube wall temperature in natural convection on heat transfer enhancement for a longitudinal externally-finned tube placed vertically in a closed space.The numerical results show that the heat transfer rate per unit mass increases with fin length.The maximum heat transfer rate per unit mass occurs when the fin angle is about 60° for all the fin angles investigated.With increasing tube wall temperature,the maximum ratio of the natural convection occurs in the temperature range studied.In order to consider the effect of fin angle on heat transfer enhancement,the dimensionless factor d/H is introduced.The natural convection heat transfer criterion of longitudinal externally-finned tube in vertical is fitted based on 65 computational cases and the mean error is 3.53% between the criterion and simulations.

Key words: finned tube, natural convection, structure optimum, heat transfer enhancement

摘要： 对封闭空间内的竖直纵向外翅片管在翅片长度、翅片夹角及基管壁温改变时的自然对流条件下的换热特性进行了三维数值研究。结果表明翅片管的单位质量散热量随翅片长度的增加而增大。在翅片长度一定时,其最大值大多出现在翅片夹角60°左右;在基管壁温升高时,对流占据比重出现极大值;在考虑翅片夹角对换热影响的基础上引入量纲1因子,依据65种算例结果拟合出竖直纵向外翅片管自然对流换热准则关系式,准则式与计算结果偏差平均为3.53%。

关键词: 翅片管, 自然对流, 结构优化, 强化传热

CLC Number:

TK124

QIU Yan, TIAN Maocheng, LENG Xueli. Heat transfer characteristic of longitudinal externally-finned tube in closed space[J]. CIESC Journal, 2013, 64(7): 2405-2410.

邱燕, 田茂诚, 冷学礼. 封闭空间内纵向外翅片管结构参数对传热的影响[J]. 化工学报, 2013, 64(7): 2405-2410.

References 16

[1]	Wang C C,Chang J Y,Chiou N F.Effects of waffle height on the airside performance of wavy fin-and-tube heat exchangers[J].Heat Transfer Engineering,1999,20(3):45-56
[2]	Wang C C,Fu W L,Chang C T.Heat transfer and friction characteristics of typical wavy fin-and-tube heat exchangers[J].Experimental Thermal and Fluid Science,1997,14:174-186
[3]	Krupiczka R,Rotegel A,Walczyk H,Dobner L.An experimental study of convective heat transfer from extruded type helical finned tubes[J].Chemical Engineering and Processing,2003,42(1):29-38
[4]	Qiu Xingqi(仇性启),Li Huayu(李华玉),Chen Yanze(陈彦泽),Guo Qixin(郭其新).Experimental research on the heat transfer and flowing resistance of the longitudinal finned tube[J].China Petroleum Machinery(石油机械),2001,29(3):8-10
[5]	Kumar R.Three-dimensional natural convective flow in a vertical annulus with longitudinal fins[J].Int.J.Heat Mass Transfer,1997,40(14):3323-3334
[6]	Yu B,Nie J H,Wang Q W,Tao W Q.Experimental study on the pressure drop and heat transfer characteristics of tubes with internal wave-like longitudinal fins[J].Heat and Mass Transfer,1999,35(1):65-73
[7]	Yu B,Tao W Q.Pressure drop and heat transfer of turbulent flow in annular tubes with internal wave-like longitudinal fins[J].Heat and Mass Transfer,2004,40(8):643-651
[8]	Wu Feng(吴峰),Lin Mei(林梅),Tian Lin(田林),Wang Qiuwang(王秋旺),Luo Laiqin(罗来勤).Experimental study and numerical simulation on convective heat transfer and pressure drop of internally longitudinal finned tube[J].Journal of Chemical Industry and Engineering (China)(化工学报),2005,56(11):2065-2068
[9]	Tian Lin(田林),Wang Qiuwang(王秋旺),Xie Gongnan(谢公南),Zhao Cunlu(赵存陆),Luo Laiqin(罗来勤).Convective heat transfer and pressure drop of annular tubes with three different internal longitudinal fins[J].Journal of Chemical Industry and Engineering (China)(化工学报),2006,57(11):2543-2548
[10]	Wang Q W,Lin M,Zeng M,Tian L.Computational analysis of heat transfer and pressure drop performance for internally finned tube with three different longitudinal fins[J].Heat Mass Transfer,2008,45:147-156
[11]	Wang Q W,Lin M,Zeng M.Effect of lateral fin profiles on turbulent flow and heat transfer performance of internally finned tubes[J].Applied Thermal Eng.,2009,29 (14/15):3006-3013
[12]	Fabbri G.Heat transfer optimization in internally finned tubes under laminar flow conditions[J].Int.J.Heat Mass Transfer,1998,41(10):1243-1253
[13]	Wu J M,Tao W Q.Numerical computation of laminar natural convection heat transfer around a horizontal compound tube with external longitudinal fins[J].Heat Transfer Engineering,2007,28(2):93-102
[14]	Ouzzane M,Galanis N.Numerical analysis of mixed convection in inclined tubes with external longitudinal fins[J].Solar Energy,2001,71(3):199-211
[15]	Braga C V M,Saboya F E M.Turbulent heat transfer,pressure drop and efficiency in annular regions with continuous longitudinal rectangular fins[J].Experimental Thermal and Fluid Science,1999,20(2):55-65
[16]	Qiu Yan(邱燕),Tian Maocheng(田茂诚),Niu Weiran(牛蔚然),Cheng Lin(程林).Natural convection heat transfer performance and optimization of longitudinal finned tube in vertical[J].Journal of Engineering Thermophysics(工程热物理学报),2008,29(9):1537-1540

Heat transfer characteristic of longitudinal externally-finned tube in closed space

封闭空间内纵向外翅片管结构参数对传热的影响

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