In an axial-flow compressor stage, what two components comprise the stage?

In an axial-flow compressor stage, what two components comprise the stage?

• A. The casing and bearings
• B. The rotor and stator
• C. The stator and the exhaust duct
• D. The inlet guide vanes and the rotor

Answer: (B)

An axial-flow compressor stage consists of two blade rows: a rotating blade row (the rotor) and a stationary blade row (the stator). The rotor transfers energy to the air, increasing its velocity and total pressure. The stator, being fixed, slows the flow and converts that kinetic energy into a larger static pressure while guiding the flow into the next stage. These two components together define the stage’s function: energy addition by the rotor followed by pressure rise and directing the flow by the stator. Other parts like the casing and bearings are support hardware, inlet guide vanes condition the flow before it reaches the rotor, and the exhaust duct is downstream, not part of the stage itself.

An axial-flow compressor stage consists of two blade rows: a rotating blade row (the rotor) and a stationary blade row (the stator). The rotor transfers energy to the air, increasing its velocity and total pressure. The stator, being fixed, slows the flow and converts that kinetic energy into a larger static pressure while guiding the flow into the next stage. These two components together define the stage’s function: energy addition by the rotor followed by pressure rise and directing the flow by the stator. Other parts like the casing and bearings are support hardware, inlet guide vanes condition the flow before it reaches the rotor, and the exhaust duct is downstream, not part of the stage itself.