Abstract
The mechanism has been studied for the effect of curved blade on leakage flow at compressor stator hub. The difference of leakage vortex track and leakage vortex intensity in the hub gap was compared before and after the application of curved blade, while their corresponding effects on boundary layer development of the suction surface analyzed. The reason causing the variation of leakage flowing was studied according to the position that the maximum load occurred and the variation of the parameters such as the adverse pressure gradient at stator hub. The distribution of the axial velocity and the flow angle at stator outlet along the blade height were studied to discuss the curved blade effect on the flow-matching at the stator hub. Results show that positive curved blades can decrease the leakage vortex intensity, enhance the flow capacity at the hub area, improve the uniformity of the outlet aerodynamic parameters, reduce the energy loss, and especially increase the axial velocity near the end wall which offered great benefit to the flow-matching near the hub in the original compressor.
| Original language | English |
|---|---|
| Pages (from-to) | 16-21 |
| Number of pages | 6 |
| Journal | Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering |
| Volume | 30 |
| Issue number | 1 |
| State | Published - Jan 2010 |
| Externally published | Yes |
Keywords
- Compressor
- Curved blade
- Leakage flow
- Stator hub gap
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