Volume 29 Issue 5
May  2014
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LI Guang-chao, LING Xu, KOU Zhi-hai, WU Chao-lin, ZHANG Wei. Experiment of cooling effectiveness with double-outlet film hole[J]. Journal of Aerospace Power, 2014, (5): 1029-1035.
Citation: LI Guang-chao, LING Xu, KOU Zhi-hai, WU Chao-lin, ZHANG Wei. Experiment of cooling effectiveness with double-outlet film hole[J]. Journal of Aerospace Power, 2014, (5): 1029-1035.

Experiment of cooling effectiveness with double-outlet film hole

  • Received Date: 2013-03-10
  • Publish Date: 2014-05-28
  • In order to understand the cooling characteristics of the double-outlet film holes further,the platform for testing film cooling effectiveness was established.The cooling effectiveness of the cycle holes and four kinds of double-outlet holes with various orientation angles was studied at the blowing ratios from 0.3 to 2.0 by infrared measurement.The results show that:compared with the cycle hole,the surface averaged cooling effectiveness of the double-outlet holes is improved by 18%-37% with 30,45 and 60 degrees of orientation angles.At the low blowing ratios,the cooling effectiveness of the double-outlet holes with 30 degree of orientation angles is most significantly improved.At the high blowing ratios,the cooling effectiveness of double-outlet holes with 60 degree of orientation angles is most significantly improved.The double-outlet holes with 45 degree orientation angles can significantly improve the cooling effectiveness at both high and low blowing ratios.The cooling effectiveness of the double-outlet holes with 75 degree of orientation angles is lower than that of the cylindrical holes.

     

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