Why are there more stages in the compressor than the turbine?
Very simply, a turbine has fewer stages than the compressor, because the flow in the turbine is going in the direction of reducing pressure – the air wants to go that way naturally. But a compressor has to make the air flow in the direction of increasing pressure.
Do turbines have stators?
The turbine, like the compressor, is composed of several rows of airfoil cascades. Some of the rows, called rotors, are connected to the central shaft and rotate at high speed. Other rows, called stators, are fixed and do not rotate.
What is the purpose of the stators in the compressor?
The stationary airfoils, also known as vanes or stators, convert the increased kinetic energy into static pressure through diffusion and redirect the flow direction of the fluid to prepare it for the rotor blades of the next stage.
What do stators do in a turbine engine?
The job of the stators is to keep the flow from spiraling around the axis by bringing the flow back parallel to the axis. Depending on the engine type, there may be multiple turbine stages present in the engine.
What is stator and rotor in turbine?
The stator acts as a guide roller, which is fixed in front of the turbine, and adjusts the mud flow direction of shocking to blade surface to improve the efficiency. The rotor is the power component.
What is the function of combustor in gas turbine?
The important function of the combustor is to efficiently mix air with the fuel and burn it in a manner that provides a high stagnation temperature with small losses in stagnation pressure and low pollutant emissions.
What is the difference between compressor stall and surge?
Compressor surge Rotating stall can morph into the extreme case of a compressor performance failure called surge. In the words of compressor expert Ivor Day, stall is a disturbance of compressor flow in the tangential direction, while surge is a disturbance in the axial direction.
How do stalling and surging take place in centrifugal compressor stages?
An unstable flow originates at the impeller middle-rear region and a high-frequency stall wave occurs firstly in the impeller during mild surge. Then the flow disturbance propagates downstream, and a high-frequency stall occurs in the diffuser prior to a deep surge.