A compressor stall is either of two failure modes of an axial flow jet engine caused by a stall of the vanes of the compressor rotor. All compressor stalls result in a loss of engine power. A stall which causes complete engine shutdown is called a flameout. A Pratt and Whitney turbofan engine for the F-15 Eagle is tested at Robins Air Force Base, Georgia, USA. The tunnel behind the engine muffles noise and allows exhaust to escape. ... A stall is a (usually undesired) condition in aerodynamics and aviation where there is a sudden loss of lift. ... Compressor has several meanings: A gas compressor is a mechanical device that takes in a gas and increases its pressure by squeezing a volume of it into a smaller volume. ...
The first, less severe type of stall, the "axis-symmetric stall", is a straightforward expulsion of air out the intake due to the compressor's inability to maintain pressure on the combustion chamber.
In the second, more-severe "rotational stall", the air flow disruption of the stall causes standing pockets of air to rotate within the compressor without moving along the axis. Without fresh air from the intake passing over the stalled compressor vanes they overheat, causing accelerated engine wear and possible damage.
The most likely cause of a compressor stall is a sudden change in the pressure differential between the intake and combustion chamber. Jet aircraft pilots must take this into account when dropping airspeed or increasing throttle.
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