What is stalling in gas turbine compressor?

Answer 1

the engine is having high pressure inside the combustion chamber.the flow has to move trough nozzle.incase the pressure is very high at nozzle compared to the intake pressure the flow moves forward.then the compressors shape changed it is not enough to compress the intake air.it is compressor stall

Answer 2

If you are referring to a gas turbine generator (i.e. an aircraft jet engine), a stall is associated with the compressor blades. Compressor blades are simply little wings (airfoils) and when the air enters the engine in an incorrect fashion (such as a strong cross wind or a birdstrike), the air does not flow over the blades as designed and can separate. This separation can be severe enough to cause the compressor to loss the ability to compress air and supply high pressure air to the combustion chambers.

The loss of the high pressure air allows the high pressure air from the combustion chamber to exit through the compressor in something called a compressor surge. The surge can be very violent and cause structural damage to blades, casing and the shaft. A compressor surge is shown in the following video just to demonstrate how an engine reacts in a compressor surge:

http://www.YouTube.com/watch?v=mQNUrYoFM2E