What role do the stationary blades in a compressor stator play?

The stationary blades in a compressor stator serve a critical function in the operation of a gas turbine engine. Their primary role is to act as diffusers, which means they help convert the high-velocity air flow coming from the rotating blades into increased static pressure. When air enters the compressor, it is accelerated by the rotating blades, resulting in high kinetic energy. The stationary blades then reduce this high velocity air speed while increasing the pressure.

This conversion is paramount for maintaining efficient engine performance, as higher pressure air entering the combustion chamber allows for a more effective combustion process when mixed with fuel. The design of the stationary blades ensures that the airflow is properly managed and directed into the combustion section, thus playing an essential role in the overall performance and efficiency of the engine.