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Stall warning in axial compressors

Anna Young (Turbomachinery)

 

Stall is the breakdown of the flow in a compressor. It must be avoided because it can do catastrophic damage to an aero-engine, so it is useful to understand as much as possible about the stall inception process. Some researchers have searched for precursors to stall that can be detected sufficiently early that stall can be averted. Previous studies using casing pressure measurements for this have been inconclusive – some researchers measure an increase in pressure signal variation while others do not. This work explains contradictions in existing research and assesses the usefulness of pressure measurements for stall warning in a real engine.

 

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