Abstract
Based on the numerical analysis of the blade tip clearance flow characteristics, the formation and development mechanism of the blade tip two-phase flow was studied, and the Effects of different blade tip clearance types on the blade tip two-phase flow were compared and discussed. The results show that the combined Effects of the injecting action, and the blade leading edge tip shedding vortex can lead the fluid thermodynamic state to enter the low pressure and low temperature regions at the leading edge of both the main and splitter blade tip. Especially, condensation maybe exist at sharp corner of the blade tip leading edge. The tip clearance leakage vortex can significantly inhibit and weaken the two-phase flow regions. With the increase of tip clearance, the distribution and development tendency of the two-phase flow regions on the main blade leading edge tip are similar, but the condensation may be more concentrated and serious at sharp corner. For the splitter blades tip, the two-phase flow regions could be significantly inhibited and weakened, with the increase of the blade tip clearance size.
| Original language | English |
|---|---|
| Pages (from-to) | 1433-1436 |
| Number of pages | 4 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 36 |
| Issue number | 7 |
| State | Published - 1 Jul 2015 |
Keywords
- Blade tip clearance
- Centrifugal compressor
- Condensation
- Supercritical CO
- Two-phase flow regions