Patent ID: 8613598

Claim:
A compression system for compressing a gaseous fluid, comprising a compressor having a gaseous fluid inlet, a first compression stage and a second compression stage, configured along a curvilinear gaseous fluid streamwise flow path, each compression stage comprising a rotating airfoil, or a rotating airfoil and a stationary airfoil, and a compressed fluid outlet; and a cooling fluid system having a liquid pump and a delivery system with a plurality of orifices distributed about one of the rotating airfoil, the stationary airfoil, and both airfoils, in fluid communication with a fluid delivery passage within at least one of the airfoils or both airfoils and a cooling passage within one of an inner rotor hub supporting the rotating airfoil and an outer fluid duct wall supporting the stationary airfoil, the orifices configured to inject into the gaseous fluid flow a cooling fluid comprising a vaporizable liquid; wherein the orifices are configured and the cooling fluid system is operable to deliver cooling fluid with a rate of injection into the gaseous fluid flow that increases in the gaseous fluid streamwise flow direction across the two compression stages.