In an axial compressor stage, the stationary stator vanes serve primarily to:

(A) Convert kinetic energy leaving the rotor into static pressure and align flow for the next stage

(B) Inject fuel directly into the airflow

(C) Accelerate the flow supersonically before entering the combustion chamber

(D) Drive the compressor spool through mechanical gearing

Answer Key:

A

### Solution: The rotor adds kinetic energy to the gas; the stator acts as a diffuser, converting kinetic energy into static pressure and straightening the flow angle for the subsequent stage. Correct: A.

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