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.
