Volume 31 Issue 6
Jun.  2016
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Article Navigation >  Journal of Aerospace Power  > 2016  >  31(6): 1335-1342
XIAO Yang, JIN Tao, HE Li-ming, DING Wei, LV Zhi-hui, DAI Sheng-ji. Numerical simulation on film cooling characteristics of heart shaped hole[J]. Journal of Aerospace Power, 2016, 31(6): 1335-1342. doi: 10.13224/j.cnki.jasp.2016.06.008
Citation: XIAO Yang, JIN Tao, HE Li-ming, DING Wei, LV Zhi-hui, DAI Sheng-ji. Numerical simulation on film cooling characteristics of heart shaped hole[J]. Journal of Aerospace Power, 2016, 31(6): 1335-1342. doi: 10.13224/j.cnki.jasp.2016.06.008
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Numerical simulation on film cooling characteristics of heart shaped hole

doi: 10.13224/j.cnki.jasp.2016.06.008

  • 1. Aeronautic and Astronautic Engineering College, Air Force Engineering University, Xi'an 710038, China;

  • 2. Research Institute of Army Aviation, the Chinese People's Liberation Army, Beijing 101121, China;

  • 3. Department of Training, Air Force Engineering University, Xi'an 710051, China;

  • 4. The 93066 Unit, the Chinese People's Liberation Army, Mudanjiang Heilongjiang 157023, China

  • Received Date: 2015-09-08
  • Publish Date: 2016-06-28
    Abstract
  • A heart shaped film cooling hole was firstly presented to improve the cooling effectiveness of modern gas turbine. The flow field performance and cooling performance were analyzed through numerical simulation. The result of heart shaped film cooling hole was compared with that of cylindrical film cooling hole. The comparisons show that the heart shaped film cooling hole can reduce the strength of counter rotating vortex pair, thus the coolant-surface attachment is improved. For heart shaped film cooling hole, the expansion structure on the hole exit allows the coolant to flow along spanwise direction, resulting in a better spanwise averaged film cooling effectiveness than that of cylindrical hole. By comparing with cylindrical hole, the heart shaped hole increases the film cooling performance. The heart shaped film cooling hole shows enhancements of approximately 70.93%, 246.94%, 598.9% and 879.07% at blowing ratio of 0.5-2.0, respectively. In terms of heat-flux ratio, the hearted shaped hole shows the lowest heat-flux ratio at blowing ratio of 1.5, indicating that the hearted shaped hole provides the best film cooling performance at blowing ratio of 1.5.

     

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