In a compressor section, what is the purpose of the stator vanes?

In a compressor section, what is the purpose of the stator vanes?

• A. Produce compression
• B. Control the direction of the airflow
• C. Increase velocity
• D. Provide structural support

Answer: (B)

Stator vanes are stationary blades between compressor stages that shape the flow. After the rotor blades impart energy to the air, creating swirl and higher velocity, the stators redirect that flow into the proper axial direction for the next stage. This directional control, turning the swirling flow into axial flow and smoothing it for the next rotor, is essential for efficient compression and proper stage matching. They don’t generate compression by themselves, nor do they primarily increase velocity, and they aren’t there for structural support—their main job is directing and shaping the airflow.

Stator vanes are stationary blades between compressor stages that shape the flow. After the rotor blades impart energy to the air, creating swirl and higher velocity, the stators redirect that flow into the proper axial direction for the next stage. This directional control, turning the swirling flow into axial flow and smoothing it for the next rotor, is essential for efficient compression and proper stage matching. They don’t generate compression by themselves, nor do they primarily increase velocity, and they aren’t there for structural support—their main job is directing and shaping the airflow.