Which component is described as the stationary part in the axial-flow compressor?

Which component is described as the stationary part in the axial-flow compressor?

• A. Rotor
• B. Stator
• C. Disk ring
• D. Impeller

Answer: (B)

In an axial-flow compressor, energy is added to the airflow by the rotating blades (the rotor) while the flow is shaped and directed by fixed blades (the stator). The stator is attached to the compressor casing and remains stationary, with vanes that straighten the swirl created by the rotor and redirect the air into the next stage, maximizing pressure rise and efficiency. The rotor and its disks (disk ring) are the rotating parts, so they are not stationary, and impeller terminology is typically used for centrifugal machines rather than axial-flow stages. Therefore, the stationary component described is the stator.

In an axial-flow compressor, energy is added to the airflow by the rotating blades (the rotor) while the flow is shaped and directed by fixed blades (the stator). The stator is attached to the compressor casing and remains stationary, with vanes that straighten the swirl created by the rotor and redirect the air into the next stage, maximizing pressure rise and efficiency. The rotor and its disks (disk ring) are the rotating parts, so they are not stationary, and impeller terminology is typically used for centrifugal machines rather than axial-flow stages. Therefore, the stationary component described is the stator.