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The rotor of an axial compressor stage

  • A.Only removes swirl from the flow
  • B.Adds energy to the air, raising total pressure and total temperature
  • C.Removes energy from the air
  • D.Changes pressure without changing total temperature

Answer: B

Work is done on the air by the moving blades, so both total pressure and total temperature rise across the rotor. The stator that follows changes neither total temperature nor the energy of the flow, converting velocity into static pressure instead.

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