Volume 30 Issue 6
Jun.  2015
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LIU Ya-fei, MAO Jun-kui, XU Rui, ZHAO Zun-sheng, HE Yi-hong, LI Wei. Numerical simulation of leakage characteristic of assembled endwall slot of turbine guide vane[J]. Journal of Aerospace Power, 2015, 30(6): 1448-1459. doi: 10.13224/j.cnki.jasp.2015.06.021
Citation: LIU Ya-fei, MAO Jun-kui, XU Rui, ZHAO Zun-sheng, HE Yi-hong, LI Wei. Numerical simulation of leakage characteristic of assembled endwall slot of turbine guide vane[J]. Journal of Aerospace Power, 2015, 30(6): 1448-1459. doi: 10.13224/j.cnki.jasp.2015.06.021

Numerical simulation of leakage characteristic of assembled endwall slot of turbine guide vane

doi: 10.13224/j.cnki.jasp.2015.06.021
  • Received Date: 2013-12-11
  • Publish Date: 2015-06-28
  • Numerical simulations were applied to study the leakage flow of assembled endwall slot of turbine guide vane of an aero-engine. The effects of leakage flow on the structure of flow field of cascade passage and performance parameters of the cascade were also discussed. The leakage flow pressures, the slot width and position of the slot were changed to investigate the rules of leakage flow rate and energy loss coefficient varying with these parameters and discover the effect rules. It is found that the leakage can appear due to different pressures between cooling air and gas, spiral vortex system is formed in the middle position of the slot at the same time, and the leakage flow affects the secondary flow around the endwall significantly. The effect decreases along the direction of blade height and the largest region is up to 44.44% of the blade height. With the increase of leakage flow pressure, the slot width and the angle between the slot and major axis of engine, the energy loss coefficient of the cascade and the leakage flow rate increase monotonically. Numerical results show that the energy loss coefficient of the cascade increases by 14%-62% because of the leakage flow through the slot of the endwall in the parameter range of present study.

     

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