Volume 21 Issue 5
Oct.  2006
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DENG Ming-chun, ZHU Hui-ren, WANG Xue-wen, XU Du-chun. Influence of density ratio on the discharge coefficient of turbine blade film cooling holes[J]. Journal of Aerospace Power, 2006, 21(5): 795-799.
Citation: DENG Ming-chun, ZHU Hui-ren, WANG Xue-wen, XU Du-chun. Influence of density ratio on the discharge coefficient of turbine blade film cooling holes[J]. Journal of Aerospace Power, 2006, 21(5): 795-799.

Influence of density ratio on the discharge coefficient of turbine blade film cooling holes

  • Received Date: 2005-08-30
  • Rev Recd Date: 2006-02-08
  • Publish Date: 2006-10-28
  • Discharge coefficients of the film cooling holes were investigated using a large-scale low speed turbine cascade.Discharge coefficients with coolant injection were determined at different density ratio,blowing ratio and Reynolds number.The results show that the influence of density ratio of secondary flow to mainstream flow on discharge coefficients of the film cooling holes is different at different hole array position.The effect of density ratio on suction surface and leading edge is more evident.The data of turbine blade surface film holes discharge coefficients obtained from experiments with small difference in temperature of the secondary and mainstream airflow should be corrected when it was attempted to apply to practice.

     

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