Abstract
The tip-leakage flow has significant effects on the flow loss of the turbine, and the blade tip cooling is of great significance to control the tip-leakage flow and improve the aerothermal performance of the blade tip. In this paper, the numerical simulation method is used to study the influence of the injection position and flow rate of the tip cooling on the control of the tip-leakage flow in the high pressure turbine. The change of tip-leakage flow structure and turbine stage efficiency is analyzed, and the influence of tip cooling on the evolution of the dominant flow structure in the gap of scraping vortex is discussed. The results show that the change of the positions of the cooling holes has a certain effect on the evolution of the scraping vortex in the gap, but it does not cause a great change in the overall efficiency of the turbine; and the cooling flow rate not only affects the evolution of the evolution of scraping vortex, but also causes the change of the turbine stage efficiency by nearly 0.5%.
| Original language | English |
|---|---|
| Pages (from-to) | 619-625 |
| Number of pages | 7 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 42 |
| Issue number | 3 |
| State | Published - Mar 2021 |
Keywords
- Aerodynamic performance
- Squealer tip
- Tip cooling
- Tip-leakage flow
- Turbine
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