Volume 31 Issue 8
Aug.  2016
Turn off MathJax
Article Contents
RAO Yu, WAN Chao-yi, CHEN Peng. Experiment and numerical computation of impingement cooling in narrow space with pin fins[J]. Journal of Aerospace Power, 2016, 31(8): 1852-1859. doi: 10.13224/j.cnki.jasp.2016.08.008
Citation: RAO Yu, WAN Chao-yi, CHEN Peng. Experiment and numerical computation of impingement cooling in narrow space with pin fins[J]. Journal of Aerospace Power, 2016, 31(8): 1852-1859. doi: 10.13224/j.cnki.jasp.2016.08.008

Experiment and numerical computation of impingement cooling in narrow space with pin fins

doi: 10.13224/j.cnki.jasp.2016.08.008
  • Received Date: 2014-11-02
  • Publish Date: 2016-08-28
  • Experimental and numerical computation were conducted on impingement cooling in a narrow space with full-height pin fins turbulated flow, and the performance comparisons were made with another impingement cooling on the flat target plate under maximum cross flow scheme. The jet Reynolds number ranges from 15000 to 30000. Transient liquid crystal thermography method was used in the experiments to obtain the detailed impingement heat transfer distribution on the endwall of the target plates, and numerical computation was done to examine the flow structure and heat transfer characteristics in the impingement cooling systems. Experimental study shows that the pin-fin can slightly improve the average heat transfer characteristics on the endwall of the target plate by about 7.0%, and increase the pressure loss by about 17.9%. It is also found that heat transfer uniformity is also improved on the endwall of the target plate with pin fin. On the other hand, numerical computations still show that the wall jets and the upwashing vortex in the space strongly interact with the pin fins, and the pin fins appreciably increase the heat transfer area, therefore the impingement cooling system with pin fins has significantly improved the total heat transfer performance by about 27.0% compared with the impingement with the flat plate.

     

  • loading
  • [1]
    Han J C,Dutta S,Ekkad S.Gasturbine heat transfer and cooling technology[M].Oxford:Taylor and Francis Group, 2001.
    [2]
    Martin H.Heat and mass transfer between impinginggas jets and solid surfaces[J].Advance in Heat Transfer,1977,13:1-60.
    [3]
    Han B,Goldstein R J.Jet-impingement heat transfer in gas turbine systems[J].Annals New York Academy of Science,2001,934:147-161.
    [4]
    Weigand B,Spring S.Multiple jet impingement:a review[J].Heat Transfer Research,2011,42(2):101-142.
    [5]
    Metzger D E,Florschuetz L W,Takeuchi D I,et al.Heat transfer characteristics for inline and staggered arrays of circular jets with crossflow of spent air[J].Journal of Heat Transfer,1979,101(3):526-531.
    [6]
    Florschuetz L W,Truman C R,Metzger D E.Streamwise flow and heat transfer distributions for jet array impingement with crossflow[J].Journal of Heat Transfer,1981,103(2):337-342.
    [7]
    Xing Y,Spring S,Weigand B.Experimental and numerical investigation of heat transfer characteristics of inline and staggered arrays of impinging jets[J].Journal of Heat Transfer,2010,132(9):092201.1-092201.11.
    [8]
    Andrews G E,Abdul H R,Mkpadi M C.Enhanced impingement heat transfer:the influence of impingement X/D for interrupted rib obstacles (rectangular pin fins)[J].Journal of Turbomachinery,2006,128(2):321-331.
    [9]
    Son C,Dailey G,Ireland P,et al.An investigation of the application of roughness elements to enhance heat transfer in an impingement cooling system[R].ASME Paper GT2005-68504,2005.
    [10]
    Wan C Y,Rao Y,Zang S.Numerical investigation of impingement heat transfer on a flat and square pin-fin roughened plates[R].ASME Paper GT2013-94473,2013.
    [11]
    El-Gabry L A,Kaninski D A.Experimental investigation of local heat transfer distribution on smooth and roughened surfaces under an array of angled impinging jets[J].Journal of Turbomachinery,2005,127(3):532-544.
    [12]
    Xing Y,Spring S,Weigand B.Experimental and numerical investigation of impingement heat transfer on a flat and micro-rib roughened plate with different crossflow schemes[J].International Journal of Thermal Science,2011,50(7):1293-1307.
    [13]
    Chyu M K,Siw S H. Recent advances of internal cooling techniques for gas turbine airfoils[J].Journal of Thermal Science and Engineering Application,2013,5(2):021008.1-021008.12.
    [14]
    Ekkad S V,Han J C.A transient liquid crystal thermography technique for gas turbine heat transfer measurements[J].Measurement Science & Technology,2000,11(7):957-968.
    [15]
    Kline S J,McClintock F A.Describing uncertainties in single-sample experiments[J],Mechanical Engineering,1953,75:3-8.
    [16]
    Kingsley-Rowe J R,Lock G D,Owen J M.Transient heat transfer measurements using thermochromic liquid crystal:lateral-conduction error[J].International Journal of Heat and Fluid Flow,2005,26(2):256-263.
    [17]
    Rao Y,Chen P,Wan C.Experimental and numerical investigation of impingement heat transfer on the surfaces with micro W-shaped ribs[J].International Journal of Heat and Mass Transfer,2016,93:683-694.
    [18]
    ANSYS Incorporation.ANSYS CFX 14.5 help document[R] Pittsbwrgh:ANSYS Incorporation,2013.
    [19]
    Celik I B,Ghia U,Roache P J,et al.Procedure forestimation and reporting of uncertainty due to discretization in CFD applications[J].Journal of Fluids Engineering,2008,130(7):078001.1-078001.4.
  • 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 (1214) PDF downloads(733) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return