Abstract
In order to investigate the influences of different hole shapes on the aerodynamic and cooling performance of turbine blades，five shapes including cylinder holes，conical holes，fillet slot holes，wedge-shaped holes， and fan-shaped holes were studied， meanwhile， the effect of blowing ratio M was considered. The results showed that the average cooling effectiveness on the blade tip surface for all five hole shapes increased with an increasing blowing ratio and reached its maximum at M=2.0. Cylinder holes and fillet slot holes had stronger cooling air diffusion， leading to a more uniform overall coverage of cooling air. On the other hand，wedge-shaped holes and fan-shaped holes had a larger area of high cooling effectiveness， with the high cooling effectiveness zone primarily concentrated in the near-trailing edge region. The relative change in average cooling effectiveness compared with circular holes was −0.3% for wedge-shaped holes and 10.7% for fan-shaped holes.
| Translated title of the contribution | Numerical study on influences of hole shapes on turbine cavity tip film cooling characteristics |
|---|---|
| Original language | Chinese (Traditional) |
| Article number | 20240510 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 40 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2025 |