Centrifugal Compressor

A centrifugal compressor is one of its class machines in producing a pressure rise and is known as turbo-compressors. In centrifugal compressors, energy is transferred by dynamic means from a rotating member (or impeller) to the continuously flowing working fluid.

The main feature of the centrifugal compressor is that the angular momentum of the fluid flowing through the impeller is increased partly by virtue of the impeller’s outlet diameter being significantly larger than its inlet diameter.

Centrifugal compressor parts labelled

Essential parts of a centrifugal compressor:

  1. The inlet casing with the converging nozzle, whose function is to accelerate the fluid to impeller inlet. The outlet of the inlet casing is known as the eye.
  2. The impeller in which the energy transfer takes place, resulting in a rise of fluid kinetic energy and static pressure.
  3. The diffuse, whose function is to transform the high kinetic energy of the fluid at the impeller outlet into static pressure.
  4. The outlet casing, which comprises a fluid collector known as the volute or scroll.
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All Comments

  • Thank you for good information

    Ahmad Apr 30, 2016 6:55 am Reply
  • Very good information & simple way of explaining

    Vijay Kumar Jha Apr 11, 2017 5:21 am Reply
  • Thank you for very precise and great information.

    Samuel Jul 1, 2017 12:57 pm Reply
  • Nice post

    Airandhydraulic Feb 11, 2020 3:14 pm Reply

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