Abstract
Double-jet film-cooling geometries on a flat plate were investigated using pressure sensitive paint (PSP) measurement technique. The spanwise distance between the double-jet film-cooling holes varied as 0, 0.5 and 1.0, while the streamwise distance was kept as 3.0. The density ratio was 1.0, 1.5 and 2.5, while the blowing ratio was 0.5, 1.0, 1.5 and 2.0. The effects of spanwise distance and density ratio on the effectiveness of double-jet film-cooling holes were studied. The results showed, at spanwise distance of 0, the lateral coverage of the film was suppressed. As the spanwise distance increased, the film covered more areas. However, while the spanwise distance was too large, the film coverage degraded. With the increase of density ratio, the lifting-off of the jets weakened, and the film-cooling effectiveness improved. At high density ratios, higher film-cooling effectiveness was achieved by the double-jet film-cooling holes with larger spanwise distance.
| Translated title of the contribution | Effects of spanwise distance and density ratio on the characteristic of double-jet film-cooling |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1336-1344 |
| Number of pages | 9 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 33 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1 Jun 2018 |