Abstract
This paper investigated numerically the effect of a coolant crossflow on film cooling effectiveness. Computations were performed to investigate the three-dimensional film cooling flow and cooling effectiveness with two crossflow ratios (Cr=0.39, 0.78) and two blowing ratios (Br=1, 2) and two length to diameter ratios (l/d=4, 8). The results of the present investigation show that there is a profound effect of how the coolant is supplied to the hole on the film-cooling performance in the near hole region, for example, crossflow ratio has great influence on the film-cooling effectiveness of surface, a bigger length to diameter ratio brings about regular flow within film holes, and a bigger blowing ratio leads to poorer adhesion of jet stream and lower film-cooling effectiveness. Therefore, crossflow at the hole entry side has to be taken into account when modeling film-cooling schemes of turbine blades.
| Original language | English |
|---|---|
| Pages (from-to) | 1353-1358 |
| Number of pages | 6 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 23 |
| Issue number | 8 |
| State | Published - Aug 2008 |
Keywords
- Crossflow
- Effectiveness
- Film cooling