Abstract
This paper presents detail measurements of film cooling effectiveness in a flat plan for a row double fan-shaped holes. The streamwise angle of hole was 45° and the diameter of hole was d. The pitch-to-diameter ratio (p′/d) contained 2, 3 and 4. The momentum flux ratios varied from 1 to 4 and the turbulence level contained 0.4% and 8%. The result indicated that the double fan-shaped holes made significant improvement of film cooling effectiveness compared with the round holes. The variety of the p/d had great effects on film cooling effectiveness. Increasing the momentum flux ratio lead to large improvement of film cooling effectiveness at the p/d=2, while the momentum flux ratio had small effects on it at the p/d=4. The enhancement of turbulence level lead to obvious decrease in film cooling effectiveness when p/d is large and the momentum ratio is high.
| Original language | English |
|---|---|
| Pages (from-to) | 2082-2087 |
| Number of pages | 6 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 23 |
| Issue number | 11 |
| State | Published - Nov 2008 |
Keywords
- Double fan-shaped hole
- Film cooling
- Hole pitch
- Turbulence level