Table 6 Maximum change rate of the four types of pre-swirls
Pre-swirl | Maximum change rate (%) | ||
|---|---|---|---|
Total pressure force | Total viscous force | Leakage flow rate | |
Axial | 3.29 | 0.04 | 0.02 |
Radial | 1.42 | 0.05 | 0.02 |
Circumferential positive | 12.74 | 0.08 | 0.03 |
Circumferential negative | 35.48 | 0.44 | 0.03 |