Volume 28 Issue 3
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SHAN Wen-juan, MAO Jun-kui, LI Yi, SHEN Yi. Experiment on heat transfer characteristics with inclined impingement[J]. Journal of Aerospace Power, 2013, 28(3): 701-708.
Citation: SHAN Wen-juan, MAO Jun-kui, LI Yi, SHEN Yi. Experiment on heat transfer characteristics with inclined impingement[J]. Journal of Aerospace Power, 2013, 28(3): 701-708.
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Experiment on heat transfer characteristics with inclined impingement

  • 1.

    College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • 2.

    Internal Flow and Heat Transfer Laboratory, Shenyang Engine Design and Research Institution, Aviation Industry Corporation of China, Shenyang 110000, China

  • Received Date: 2012-04-14
  • Publish Date: 2013-03-28
    Abstract
  • Experiments were conducted to investigate the heat transfer characteristics of a typical cooling structure of blade tip clearance active control system with 45 degree inclined impingement.In experiments,jet Reynolds number Re(33297～83242) and the ratio of jet impingement distance to the diameter of the jet hole H/d(2～6) were changed.Heated foil and infrared thermal imaging technology were used to investigate the local Nu(Nusselt number) and Nu(average Nusselt number) by varying those parameters.It was found that there existed two peaks of heat transfer coefficient along the jet line,located at the main and secondary stagnation points respectively.The two peaks were more evident in larger Re and smaller H/d cases.The experimental results show that the flow characteristics are significantly strengthened with the increase of Re increasing,which results in much larger Nu and Nu.With H/d decrease,the local heat transfer at the main stagnation point increases faintly,meanwhile,the local heat transfer at the secondary stagnation point is enhanced greatly.

     

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