Turbomachinery is found everywhere in the modern world. This big family of machines include pumps, turbines and fans. The essential components are the rotor, which obviously is rotating; a shaft from which the energy is extracted or added to the rotor and a casing where the shaft stems from. Fluid is introduced through pipes in the case. Turbomachinery works transferring energy between fluid and rotor. When energy is extracted from fluid, the machine is called turbine, in the opposite case it will be a pump, fan or compressor.