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An axial compressor stage consists of

  • A.A rotor row followed by a stator row
  • B.A stator row followed by a rotor row
  • C.Two rotor rows in series
  • D.An impeller and a volute

Answer: A

The rotor adds energy to the air and raises both its velocity and its pressure, and the stator then converts part of that velocity into further pressure while removing swirl. Both rows diffuse the flow, which is what makes a compressor so much harder to design than a turbine.

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