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Which one of the following air compressors are generally used in the gas turbines? 

Which one of the following air compressors are generally used in the gas turbines?  Correct Answer Axial flow rotary compressors

Explanation:

Rotary compressor

In a rotary air compressor, the air is entrapped between two sets of engaging surfaces, and the pressure of air is increased by squeezing action or backflow of the air. It is driven by either by an electric motor or an engine. The speed of the rotary air compressor is high as compared to the reciprocating air compressor.

There are two types of rotary compressors.​

  • Centrifugal compressor
  • Axial flow compressor

Axial flow rotary compressor

  • An axial-flow compressor, In its simplest form, consists of a number of rotating blade rows fixed to a rotating drum.
  • The drum rotates inside the airtight casing, which has fixed stator blades. The blades are made of aerofoil section to reduce the loss caused by turbulence and boundary separation.
  • As the drum rotates, the air flows through the alternately arranged stator and rotor.
  • The flow of air is parallel to the axis of the compressor.
  • Axial flow rotary compressor is generally used in a gas turbines.

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