三角形穿孔翅片对自然对流传热的强化作用

A·H·艾尔伊莎; M·I·艾尔威甸

三角形穿孔翅片对自然对流传热的强化作用

A·H·艾尔伊莎¹,
M·I·艾尔威甸²

1.
胡森大学学院拜勒加应用大学,胡森,艾伯德,约旦;2.约旦科技大学工程学院,艾伯德 22110,3030信箱,约旦

详细信息

中图分类号: TB131；TB61+1
计量
- 文章访问数: 2874
- HTML全文浏览量: 231
- PDF下载量: 587
- 被引次数: 0
出版历程
- 收稿日期: 2007-03-22
- 修回日期: 2008-06-06
- 刊出日期: 2008-08-15

Enhancement of Natural Convection Heat Transfer From a Fin by Triangular Perforations of Bases Parallel and Toward Its Tip

Abdullah H. AlEssa¹,
Mohamad I. Al-Widyan²

1.
Al-Balqa Applied University, Al-Husn University College, Al-Husn, Irbid, Jordan;

摘要

摘要: 研究一种设置水平矩形翅片对自然对流传热的强化作用，翅片内含三角形穿孔，三角形的底边平行并朝向翅片顶端．比较了这种多孔翅片和同等实心翅片的热耗散率．考虑的参数包括翅片及其穿孔的几何尺寸和热性能．讨论了翅片穿孔后引起的传热强化和翅片重量的减轻．结果表明，在某些三角形穿孔和穿孔间距的值域内，穿孔翅片改进了同等情况实心翅片的热耗散．当翅片导热率及其厚度增大时，穿孔翅片的传热也强化．
- 翅片表面 /
- 传热强化 /
- 三角形穿孔 /
- 自然对流 /
- 有限元 /
- 穿孔翅片 /
- 热耗散
Abstract: Heat transfer enhancement from a horizontal recrtarrgular fin embedded with triangular perforations (their bases are parallel and toward to the fin tip) under natural convection is studied.Its heat dissipation rate was compared to that of the equivalent solid one.The parameters considered were geometrical dimensions and thermal properties of the fin and of the perforations.The gain in heat transfer enhancement and the fin weight reduction due to the perforations was considered.It is shown also that the heat dissipation from the perforated fin for certain range of triangular perforation dimension and spaces between perforations result in improvement in heat transfer over the equivalent solid fin.The heat transfer enhancement of the perforated fin increases as the fin thermal conductivity and its thicluress are increased.
- finned surfaces /
- heat transfer enhancement /
- triangular perforations /
- natural convection finite element /
- perforated fin /
- heat dissipation /

HTML全文

参考文献(16)

[1]	Bergles A E. Technique to augment heat transfer[A].In: Werren M Rohsenow, James P Hartnett, Ejup N Ganic,Eds.Handbook of Heat Transfer Applications[C]. Ch 3. 2nd Ed. NY: McGraw-Hill Book Company，1985.
[2]	Al-Essa A H, Al-Hussien F M S. The effect of orientation of square perforations on the heat transfer enhancement from a fin subjected to natural convection[J].Heat and Mass Transfer,2004,40(6/7):509-515.
[3]	Mullisen R, Loehrke R. A study of flow mechanisms responsible for heat transfer enhancement in interrupted-plate heat exchangers[J].Journal of Heat Transfer,Transactions of the ASME,1986,108(2):377-385. doi: 10.1115/1.3246933
[4]	Prasad B V S S S, Gupta A V S S K S.Note on the performance of an optimal straight rectangular fin with a semicircular cut at the tip[J].Heat Transfer Engineering,1998,19(1):53-58.
[5]	Kutscher C F. Heat exchange effectiveness and pressure drop for air flow through perforated plates with and without crosswind[J].Journal of Heat Transfer,1994,116(2):391-399. doi: 10.1115/1.2911411
[6]	Chung B T F, Iyer J R. Optimum design of longitudinal rectangular fins and cylindrical spines with variable heat transfer coefficient[J].Heat Transfer Engineering,1993,14(1):31-42. doi: 10.1080/01457639308939792
[7]	Kakac S, Bergles A E, Mayinger F.Heat Exchangers, Thermal-Hydraulic Fundamentals and Design[M]. Hemisphere Publishing Corporation, 1981.
[8]	Al-Essa A H. Enhancement of thermal performance of fins subjected to natural convection through body perforation[D].Ph D thesis.Iraq:Department of Mechanical Engineering, University of Baghdad and Jordan:University of Science and Technology,2000.
[9]	Raithby G D, Holands K G T. Natural convection[A].In: Rohsenow W M,Hartnett J P,Ganic E N,Eds.Handbook of Heat Transfer Applications[C].2nd Ed. Ch 6. New York: McGraw-Hill Book Company, 1984.
[10]	Sparrow E M, Oritz M Carranco. Heat transfer coefficient for the upstream face of a perforated plate positioned normal to an oncoming flow[J].Internat J Heat Mass Transfer,1982,25(1):127-135. doi: 10.1016/0017-9310(82)90241-1
[11]	Akyol Ugur, Bilen Kadir.Heat transfer and thermal performance analysis of a surface with hollow rectangular fins[J].Applied Thermal Engineering,2006,26(2/3):209-216. doi: 10.1016/j.applthermaleng.2005.05.014
[12]	Sahin Bayram, Demir Alparslan.Performance analysis of a heat exchanger having perforated square fins[J].Applied Thermal Engineering,2008,28(5/6):621-632. doi: 10.1016/j.applthermaleng.2007.04.003
[13]	Aziz A, Lunadini V.Multidimensional steady conduction in convicting, radiating, and convicting-radiating fins and fin assemblies[J].Heat Transfer Engineering,1995,16(3):32-64. doi: 10.1080/01457639508939857
[14]	Razelos P, Georgiou E. Two-Dimensional effects and design criteria for convective extended surfaces[J].Heat Transfer Engineering,1992,13(3):38-48. doi: 10.1080/01457639208939780
[15]	Rao S S.The Finite Element Method in Engineering[M].2nd Ed. Elmsford, NY: Pergamon, 1989.
[16]	Incropera Frank P, Dewitt David P.Fundamentals of Heat and Mass Transfer[M].4th Ed. New York: John Wiley and Sons,1996,110.