ZHANG Di, GUO Shuai, XIE Yong-hui. Numerical and Experimental Study of Heat Transfer Enhancement Based on the Structure of Cooling-Channels With Dimples[J]. Applied Mathematics and Mechanics, 2014, 35(3): 254-263. doi: 10.3879/j.issn.1000-0887.2014.03.003
Citation: ZHANG Di, GUO Shuai, XIE Yong-hui. Numerical and Experimental Study of Heat Transfer Enhancement Based on the Structure of Cooling-Channels With Dimples[J]. Applied Mathematics and Mechanics, 2014, 35(3): 254-263. doi: 10.3879/j.issn.1000-0887.2014.03.003

Numerical and Experimental Study of Heat Transfer Enhancement Based on the Structure of Cooling-Channels With Dimples

doi: 10.3879/j.issn.1000-0887.2014.03.003
  • Received Date: 2013-09-20
  • Rev Recd Date: 2013-12-12
  • Publish Date: 2014-03-15
  • The dimple has bright prospect in the micro heat exchanger for smaller flow resistance and better heat transfer enhancement characteristics. Numerical and experimental study of heat transfer enhancement based on the structure of cooling rectangular channels with dimples was carried out. The flow structure and heat transfer characteristics in laminar air flow with different dimple depths and different Reynolds numbers were investigated, and the results were compared with those of the corresponding flat cases. The results show that: with the increasing Reynolds number, the heat transfer effect gradually increases; there exists the best dimple depth between 1 mm and 2 mm at the 3 Reynolds numbers (Re=500,1 000, 1 500); the flow separation occurs inside the dimple and the separation point is located in front of the dimple center, which results in the best heat transfer characteristics; at the same Reynolds number, the resistance characteristics decrease with the increasing dimple depth, and the thermal performance decreases with the increasing Reynolds number.
  • loading
  • [1]
    Bearman P W, Harvey J K. Control of circular cylinder flow by the use of dimples[J].AIAA Journal,1993,31(10): 1753-1756.
    [2]
    Sherrow L D, Ligrani P M,Chudnovsky Y. Effects of exterior surface dimples on heat transfer and friction factors for a cross-flow heat exchanger[J].Journal of Enhanced Heat Transfer,2006,13(1): 1-16.
    [3]
    Moon H K, O’Connell T, Glezer B. Channel height effect on heat transfer and friction in a dimpled passage[J].Journal of Engineering for Gas Turbines and Power,2000,122(2): 307-313.
    [4]
    Mahmood G I, Hill M L, Nelson D L, Ligrani P M, Moon H-K, Glezer B. Local heat transfer and flow structure on and above a dimpled surface in a channel[J].Journal of Turbomachinery,2001,123(1): 115-123.
    [5]
    Elyyan M A, Tafti D K. Flow and heat transfer characteristics of dimpled multilouvered fins[J].Journal of Enhanced Heat Transfer,2009,16(1): 43-60.
    [6]
    XIAO Nian, ZHANG Qiang, Ligrani P M, Mongia R. Thermal performance of dimpled surfaces in laminar flows[J].International Journal of Heat and Mass Transfer,2009,52(7/8): 2009-2017.
    [7]
    Fischer M, Juric D, Poulikakos D. Large convective heat transfer enhancement in microchannels with a train of coflowing immiscible or colloidal droplets[J].Journal of Heat Transfer,2010,132(11): 112402.
    [8]
    Mahmood G I, Sabbagh M Z, Ligrani P M. Heat transfer in a channel with dimples and protrusions on opposite walls[J].Journal of Thermophysics and Heat Transfer,2001,15(3): 275-283.
    [9]
    Chang S W, Chiang K F, Chou T C. Heat transfer and pressure drop in hexagonal ducts with surface dimples[J].Experimental Thermal and Fluid Science,2010,34(8): 1172-1181.
    [10]
    Park J, Desam P R, Ligrani P M. Numerical predictions of flow structure above a dimpled surface in a channel[J].Numerical Heat Transfer, Part A: Applications: An International Journal of Computation and Methodology,2004,45(1): 1-20.
    [11]
    Zhou F, Acharya S. Mass/heat transfer in dimpled turbine-blade coolant passages[J].Heat Transfer in Gas Turbine Systems, Annals of the New York Academy of Sciences,2001,934: 424-431.
    [12]
    蓝吉兵, 谢永慧, 张荻. 微通道中球窝/球凸强化传热特性研究[J]. 西安交通大学学报, 2011,45(7): 89-94,111.(LAN Ji-bing, XIE Yong-hui, ZHANG Di. Heat transfer enhancement in micro-channel with dimples and protrusions[J].Journal of Xi’an Jiaotong University,2011,45(7): 89-94,111.(in Chinese))
    [13]
    申仲旸, 谢永慧, 张荻, 蓝吉兵. 不同球窝/球凸结构的旋转矩形通道传热及阻力特性研究[J]. 西安交通大学学报, 2011,45(11): 52-57.(SHEN Zhong-yang, XIE Yong-hui, ZHANG Di, LAN Ji-bing. Heat transfer and flow friction performance of rotating rectangular channels with different dimple/protrusion structures[J].Journal of Xi’an Jiaotong University,2011,45(11): 52-57.(in Chiense))
    [14]
    张荻, 申仲旸, 谢永慧. 二次球窝/凸结构的流动控制及强化传热分析[J]. 中国电机工程学报, 2012,32(17): 44-50.(ZHANG Di, SHEN Zhong-yang, XIE Yong-hui. Study on flow control and heat transfer performance based on secondary dimple/protrusion[J].Proceedings of the CSEE,2012,32(17): 44-50. (in Chinese))
    [15]
    向飒. 基于正交设计的凹坑蜂窝板强化传热性能研究[J]. 河南理工大学学报: 自然科学版, 2012,31(3): 317-321.(XIANG Sa. Study on the heat transfer performance of honeycomb plate with different parameters by orthogonal design[J].Journal of Henan Polytechnic University(Natural Science),2012,31(3): 317-321. (in Chinese))
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (946) PDF downloads(768) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return