Abstract
Three-dimensional unsteady calculations were performed to explore the unsteady nature of tip clearance flow and its possible linking with the spike stall inception. It was found that the interaction of the broken-down leakage vortex with the tip clearance flow formed another distinctive vortex, denoted as the tip separation vortex. It formed below the rotor blade tip section and propagated diagonally inward. This vortex propagated across the rotor passage from the pressure side to the suction side with its vortex core filled with low-energy fluid. The spike emergence during stall inception included the breakdown of the tip leakage vortex and the formation and movement of the tip separation vortex.
| Original language | English |
|---|---|
| Pages (from-to) | 85-96 |
| Number of pages | 12 |
| Journal | Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy |
| Volume | 224 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Jan 2010 |
Keywords
- Axial compressor
- Tip clearance flow
- Tip separation vortex
- Vortex breakdown