tubine stall

[chaitanyaa330]

Hi guys

well we heard that comprssors stall (axial engine) can some somebody explain why turbines doesnt stall.
very urgent query

[vanjast]

Wiki has few descriptions, which seem to be the same for compressor as well as turbine.

[lomapaseo]

There is less pressure behind them then in front so their angle of incidence with the air is less critical. A little bit like a childs pinwheel, as long as you blow on it it will always spin and accept you energy input as hot air..

Not nearly as critical as a driven rotor trying to coax the air through to a higher pressure behind

[Bye]

Turbine blades can stall, they are just airfoils with a stream of gas passing over them no different to the wing of a glider. so they can stall if for example the gas is swirling too much and the angle of attack moves out of limit the blade will stall.

The aerodynamic efficiency of turbine blades is less critical than compressor blades so they can be designed with little chance of stalling.

GB

[Engineer_aus]

Pretty much happens when the VGV, or IGV pending on the engine does not put the airflow correctly onto the rotor, which then can induce a stall due to the critical airflow. There is plenty of reference material out there.

[flame_bringer]

Turbines expand the air so the likelyhood of a reversed flow is very little however if The turbines are damaged and are unable to do thier job then only they may stall.

[chaitanyaa330]

any reference other than guesses for turbine stall if any link is grateful coz there are mixed answers

[Engineer_aus]

Jeppersen books are a useful for this info. Namely the powerplant one.