Sage-Tips

What is the purpose of a turbine engine inlet and compressor?

All turbine engines have an inlet to bring free stream air into the engine. The inlet sits upstream of the compressor and, while the inlet does no work on the flow, inlet performance has a strong influence on engine net thrust.

Why does a compressor have more stages than 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.

What is one purpose of the stator blades in the compressor section of a turbine engine?

The stator blades are fixed and act as diffusers at each stage. They partially convert high velocity air into high pressure. Each rotor/stator pair is a compressor stage.

What is the function of the compressor inlet casing?

Casing functions. The major functions of any compressor case, regardless of type are: To provide support of all bearing seals and stationary internals. To provide positive containment of the process fluid.

How does jet engine start?

This starting process normally uses an electric motor to spin the main turbine shaft. The electric motor spins the main shaft until there is enough air blowing through the compressor and the combustion chamber to light the engine. Fuel starts flowing and an igniter similar to a spark plug ignites the fuel.

Why does a jet engine have a compressor?

All jet engines have a compressor to increase the pressure of the incoming air before it enters the burner. Compressor performance has a large influence on total engine performance .

What is the function of the turbine in a jet engine?

The turbine is at the heart of any jet engine with its primary task being to drive the compressor. As described previously without the compressor no mechanical work would be done on the fluid prior combustion and the thrust produced would only be a function of the chemical energy stored within the fuel.

What type of compressor is used in an aircraft turbine?

For larger turbines used on civil aircraft the most suitable compressor and turbine will be of the axial type. Early axial compressors were able to raise the pressure of the incoming area around 5-fold, while modern turbofan engines have pressure ratios in excess of 30:1.

What is the difference between axial and turbojet compressors?

Early axial compressors were able to raise the pressure of the incoming area around 5-fold, while modern turbofan engines have pressure ratios in excess of 30:1. Low pressure axial compressor scheme of the Olympus BOl.1 turbojet.