Volume 36 Issue 11
Nov.  2021
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WEI Hong, ZU Yingqing. Film cooling performance and flow resistance characteristics of single/triple-row fan-shaped holes based on actual density ratio[J]. Journal of Aerospace Power, 2021, 36(11): 2331-2343. doi: 10.13224/j.cnki.jasp.20210306
Citation: WEI Hong, ZU Yingqing. Film cooling performance and flow resistance characteristics of single/triple-row fan-shaped holes based on actual density ratio[J]. Journal of Aerospace Power, 2021, 36(11): 2331-2343. doi: 10.13224/j.cnki.jasp.20210306
shu

Film cooling performance and flow resistance characteristics of single/triple-row fan-shaped holes based on actual density ratio

doi: 10.13224/j.cnki.jasp.20210306
  • 1.

    Department of Aeronautics and Astronautics，Fudan University，Shanghai 200433，China

  • 2.

    School of Mechanical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China

  • Received Date: 2021-06-17
  • Publish Date: 2021-11-28
    Abstract
  • The heat transfer and flow resistance characteristics of single/triple-row of fan-shaped film cooling holes under the condition of true density ratio were experimentally studied.The pressure-sensitive paint （PSP） technology was used in the wind tunnel to test the film cooling performance of the fan-shaped holes with a constant outlet width，and the differences in heat transfer and flow resistance characteristics of fan-shaped film cooling holes with different hole shape parameters under the condition of real density ratio were studied.The hole shape parameters of fan-shaped holes implementing the critical blowing ratio of the coolant jet blowing away from the hot-side wall surface and the hole shape parameters with highest span-wise average film cooling effectiveness were obtained.The experimental results indicated that：within the range of hole shape parameters studied，for fan-shaped holes，when blowing ratio was less than 1.5，the coolant jet wasn't blown away from the hot-side wall surface，and the film cooling performance of the fan-shaped hole with inclination angle of 20° and diffusion angle of 15° was the best.However，when blowing ratio equaled to 2.0，partial coolant jet was blown away from the hot-side surface，the film cooling effectiveness of the fan-shaped hole with inclination angle of 25° and diffusion angle of 10° was the largest.In addition，the discharge coefficients of the fan-shaped holes with inclination angle of 25° and diffusion angle of 13° and those of the fan-shaped hole with inclination angle of 30° and diffusion angle of 10° were the highest.

     

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