Volume 25 Issue 12
Dec.  2010
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Article Navigation >  Journal of Aerospace Power  > 2010  >  25(12): 2770-2778
HAN Chang, LI Jia, LI Xue-ying, REN Jing, JIANG Hong-de. Characteristic of double-jet film cooling tested by pressure sensitive paint[J]. Journal of Aerospace Power, 2010, 25(12): 2770-2778.
Citation: HAN Chang, LI Jia, LI Xue-ying, REN Jing, JIANG Hong-de. Characteristic of double-jet film cooling tested by pressure sensitive paint[J]. Journal of Aerospace Power, 2010, 25(12): 2770-2778.
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Characteristic of double-jet film cooling tested by pressure sensitive paint

  • Gas Turbine Research Center,Department of Thermal Engineering, School of Mechanical Engineering,Tsinghua University,Beijing 100084,China

  • Received Date: 2009-11-09
  • Rev Recd Date: 2010-05-17
  • Publish Date: 2010-12-28
    Abstract
  • The characteristics of the film cooling system with double-jet,round and shaped holes were investigated under the condition of mainstream turbulence 6% and blowing ratio 0.5,0.8,1.0,1.2,1.5 in the study.The pressure sensitive paint (PSP) was implemented in the tests as the main measurement technique.The film cooling effectiveness decreases between blowing ratio 0.8 and 1.5 in the case of round holes,but increases in the whole experimental blowing ratio in the case of shaped holes and double-jet.It indicates that the double-jet restrains the lift-off of the cooling jet.The film cooling effectiveness of double-jet is better than that of the round holes,but poor than that of the shaped holes in the same conditions.Meanwhile,the vortex structures near the three focused holes obtained from the corresponding computations are major causes of the characteristics of the investigated film cooling systems.

     

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