摘要
Cooling effectiveness and discharge coefficients of cylindrical gas-film cooling holes were numerically investigated to determine the effects of momentum ratio, density ratio, and turbulence on flow in the holes. The results show that with the increase of momentum ratio, the second flow deviates from the blade at the outlet of the gas-film hole and the velocity in a high velocity zone decreases. Moreover, the cooling effectiveness decreases with the increase of dimensionless length at fixed turbulence and density ratio. In addition, the effect of turbulence on the cooling effectiveness is slight at the low density ratio. The different turbulence causes significant change of the cooling effectiveness and the cooling effectiveness decreases with the decrease of density ratio when density ratio to 1.5. There is an obvious difference between the numerical value and experimental value of the cooling effectiveness at the outlet of the gas-film hole.
| 源语言 | 英语 |
|---|---|
| 页（从-至） | 101-105 |
| 页数 | 5 |
| 期刊 | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University |
| 卷 | 43 |
| 期 | 3 |
| 出版状态 | 已出版 - 3月 2009 |