Volume 28 Issue 6
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WANG Peng-fei, GUO Wen, ZHANG Jing-zhou. Experimental investigation and numerical analysis of windage heating in rotating labyrinth seals[J]. Journal of Aerospace Power, 2013, 28(6): 1402-1408.
Citation: WANG Peng-fei, GUO Wen, ZHANG Jing-zhou. Experimental investigation and numerical analysis of windage heating in rotating labyrinth seals[J]. Journal of Aerospace Power, 2013, 28(6): 1402-1408.
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Experimental investigation and numerical analysis of windage heating in rotating labyrinth seals

  • 1.

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

  • 2.

    China Gas Turbine Establishment, Aviation Industry Corporation of China, Chengdu 610500, China

  • Received Date: 2012-06-01
  • Publish Date: 2013-06-28
    Abstract
  • Experiments were conducted to investigate the windage heating characteristics in real size models of stepped labyrinth seals.The change in total temperature across the labyrinth seal was measured in a high speed test facility at different pressure ratios (1.05-2.8),relative sealing clearances(2.4-4.0),Reynolds numbers(1900-28000) and rotational speeds (0-12000r/min).Based on the experiments,the renormalization group (RNG) k-ε turbulence model was used to compute the windage heating characteristics of the same stepped labyrinth seals.The results indicate that the temperature rise decreases with the increases of pressure ratio,Reynolds number and relative sealing clearance,and it increases with the increase of rotational speed.In addition,the numerical simulation satisfies the experiment.The most of the windage heating takes place in the first half of the seals,and the value of temperature rise is about 60% in the first two tooth chambers.An empirical expression for the windage heating coefficient was obtained and it fits the experimental results well.

     

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