Centrifugal compressors are used in industry because they have fewer rubbing parts. The internal mechanism of a centrifugal compressor undergoes high stresses and the viscosity of the fluid is changed both in speed and consistency. Liquid nitrogen is commonly used and can travel at 0.3 MACH speed. The compressor obtains pressure rises by applying kinetic energy to a fluid through a rotor. This
. increase is recaptured by slowing the flow through a diffuser or other such device.
