Volume 30 Issue 7
Jul.  2015
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Article Navigation >  Journal of Aerospace Power  > 2015  >  30(7): 1554-1560
LIU Gao-wen, CHEN Kai, GANG Tie, ZHENG Hai-liang. Influences of pressure ratio and Reynolds number on flow characteristics of labyrinth seal in compressor stator well[J]. Journal of Aerospace Power, 2015, 30(7): 1554-1560. doi: 10.13224/j.cnki.jasp.2015.07.003
Citation: LIU Gao-wen, CHEN Kai, GANG Tie, ZHENG Hai-liang. Influences of pressure ratio and Reynolds number on flow characteristics of labyrinth seal in compressor stator well[J]. Journal of Aerospace Power, 2015, 30(7): 1554-1560. doi: 10.13224/j.cnki.jasp.2015.07.003
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Influences of pressure ratio and Reynolds number on flow characteristics of labyrinth seal in compressor stator well

doi: 10.13224/j.cnki.jasp.2015.07.003

  • 1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072;

  • 2. Shenyang Engine Design and Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China

  • Received Date: 2014-01-22
  • Publish Date: 2015-07-28
    Abstract
  • To study the flow characteristics of a labyrinth seal in a compressor stator well, numerical simulations on the performances of a labyrinth seal with inlet and outlet rotating disc cavities of an aero-engine compressor was carried out. Sealing characteristics, swirl characteristics and windage heating characteristics were studied in depth at pressure ratio range 1.05-1.30 and Reynolds number range 100-50000. The differences of the flow characteristics of straight-through labyrinth with/without inlet and outlet rotating disc cavities were compared. The computational results show that inlet and outlet rotating disc cavities have obvious influence on the flow of the labyrinth. With the increase of pressure ratio, the discharge coefficient increases, and the sealing effect grows worse, while the outlet swirl ratio and windage heating decreases. With the increase of Reynolds number, the discharge coefficient increases significantly, the outlet swirl ratio and windage heating decreases. At high Reynolds number, the discharge coefficient, outlet swirl ratio and windage heating changes slightly.

     

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