Abstract
The casing treatment has the potential to extend the operating range of compressor. A time accurate 3-dimentional numerical simulation was performed for the casing treatment in a low speed centrifugal compressor in order to check and analyze the working mechanism by which casing treatment improves stall margin. The results between the numerical calculations and the experiments are compared. The different tip flow topologies between the cases with casing treatment and with untreated smooth wall have been exposed by detailed analyses of the flow visualization at the tip of the blades. The effect of casing treatment on the tip leakage vortex and secondary flow is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 32-35 |
| Number of pages | 4 |
| Journal | Tuijin Jishu/Journal of Propulsion Technology |
| Volume | 28 |
| Issue number | 1 |
| State | Published - Feb 2007 |
Keywords
- Casing treatment
- Second flow
- Tip leakage vortex
- Unsteady flow