JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2014, Vol. 44 ›› Issue (6): 90-94.doi: 10.6040/j.issn.1672-3961.0.2014.125

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Numerical study on the air motion of H-type finned tubes and heat transfer characteristics

WU Yanyan, SUN Fengzhong, LI Fei, CHEN Changxian   

  1. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
  • Received:2014-05-04 Revised:2014-09-30 Published:2014-05-04

Abstract: In order to analyze H-type finned tubes in different arrangement modes numerically, flow and heat transfer numerical models of H-type finned tubes in different arrangement forms were established. The change rules of flow and heat transfer characteristics of two typical arrangements has been obtained. The result showed that the special groove structure of H-type finned tubes turned leeward side into vertical flushing flow field with obvious three-dimensional flow characteristics which had the functions of automatic cleaning and nearly gathering no dust. The heat transfer coefficient of staggered finned parent tubes was higher than that of the parent tubes arranged in equal interval. Additionally, the difference of heat transfer effect was increasingly obvious with the increase of speed. The influence of array pitch of tubes on the heat transfer coefficient of finned tubes was remarkably greater than that of row pitch. The increase of the array pitch of tubes lowered the average speed of air in flow channel, heat transfer coefficient and the loss of flow channel.

Key words: heat-transfer characteristic, array pitch, resistance characteristic, row pitch, H-type finned tube

CLC Number: 

  • TK222
[1] 于建祖. 换热器原理与设计[M]. 北京:北京航空航天出版社,2006.
[2] 凯斯. 紧凑式热交换器[M]. 北京:科学出版社,1997.
[3] 张节庆,郑建飞.蝶形肋片省煤器在多灰烟气中的应用[J].锅炉技术,2003,34(5):457-460. ZHANG Jieqing, ZHENG Jianfei. Application of butterfly fin surface in economizers[J]. Boiler Technology, 2003, 34(5):457-460.
[4] 冯丽丽,杜小泽,杨勇平,等.椭圆管矩形翅片空气流动的扰流特征[J]. 工程热物理学报,2011,32(1):119-122. FENG Lili, DU Xiaoze, YANGYongping, et al. Characteristics of air flow around elliptical tubes with rectangular fins[J]. Journal of Engineering Thermophysics, 2011, 32(1):119-122.
[5] 冯丽丽. 大型电站直接空冷凝汽器传热性能实验研究[D].北京:华北电力大学,2006. FENG Lili. Experimental study on the characteristics of heat transfer of large scale utility direct air-cooled condenser[D]. Beijing: North China Electrical Power University, 2006.
[6] SCHULENBERY F J. Finned elliptical tubes and their application in air cooled heat exchangers[J]. Trans of the SAME Ser. B Journal of Engineering for Industry, 1966,88:179-190.
[7] MEYER C J, KROGER D J. Plenum chamber flow losses in forced draught air-cooled heat exchangers[J]. Applied Thermal Engineering, 1998, 18(9):875-893.
[8] MEYER C J, KROGER D G. Air-cooled heat exchanger inlet flow losses[J]. Applied Thermal Engineering, 2001, 21(9):771-786.
[9] MESBAH G K, AMIR F, DAVID S K. An experimental characterization of cross-flow cooling of air via an in-line ellipitical tube array[J]. International Journal of Heat and Fluid Flow, 2004, 25(4):636-648.
[10] ROCHA L A O, SABOYA F A M, VARGAS V A C. A comparative study of elliptical and circular sections in one and two row tubes and plate fin exchangers[J]. Heat Fluid Flow, 1997, 18(2):247-252.
[11] SHOALS M S, O'BRIEN J E. Improving Air-cooled condenser performance using winglets and oval tubesm a geothermal power plant[J]. Geothermal Resources Council Transactions, 2001, 25(7):1-7.
[12] TIWARI S, MAURYA D, BISWAS G, et al. Heat transfer enhancement in cross-flow heat exchangers using oval tubes and multiple delta winglets[J]. International Journal of Heat and Mass Transfer, 2003, 48(6):2841-2856.
[13] 牛天况,王振滨. H型鳍片管传热过程的研究[J].锅炉技术,2007,38(4):6-10. NIU Tiankuang, WANG Zhenbin. Research of H-type finned tubes heat transfer[J]. Boiler Technology, 2007, 38(4):6-10.
[14] 牛天况,王振滨. H型鳍片管传热的分析和计算[J].锅炉技术,2012,43(1):1-5. NIU Tiankuang, WANG Zhenbin. Analysis and calculation of H-type finned tubes heat transfer[J]. Boiler Technology, 2012, 43(1):1-5.
[15] 童鲁海. H型鳍片管传热性能的三维数值模拟仿真[J].机电工程,2007,24(10):79-81. TONG Luhai. 3D numerical analysis of heat transfer characteristics for H-type finned tube[J]. Mechanical & Electrical Engineering Magazine, 2007, 24(10): 79-81.
[16] 张知翔,王云刚.H型鳍片管传热特性的数值模拟及验证[J].动力工程学报,2010,30(5): 368-372. ZHANG Zhixiang, WANG Yungang. Numerical simulation and verification on heat transfer characteristics of H-type finned tubes[J]. Journal of Chinese Society of power Engineering, 2010, 30(5):368-372.
[17] 杨大哲. H型鳍片管传热与流动特性试验研究[D].济南:山东大学,2009. YANG Dazhe. Experimental study on the characteristics of heat transfer and flow of H-type finned tube[D].Jinan: Shandong University, 2009.
[18] 崔延军. 矩形翅片椭圆管换热器换热性能的数值研究[D].上海:东华大学, 2012. CUI Yanjun. Numerical study of heat transfer performance of rectangular finnned elliptical tube heat exchanger[D]. Shanghai: Donghua University, 2012.
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