Patent ID: 8690106

Claim:
An apparatus for reduction of a velocity deficit of an airflow entering an open-rotor fan propulsion system, the apparatus comprising: an aerodynamic strut operable to structurally support the open-rotor fan propulsion system the aerodynamic strut comprising one or more perforated surfaces; a plenum chamber comprising a venturi shape within the aerodynamic strut operable to draw external air into the plenum chamber from the one or more perforated surfaces; an ejector mixing chamber comprising a constant width and coupled to the plenum chamber and a trailing edge slot in a trailing portion of the aerodynamic strut; and at least one primary ejector nozzle located aft of the plenum chamber and comprising a plurality of small nozzles each operable to: receive compressed air only from a compressor and to inject an air jet of pressurized air consisting only of air into the ejector mixing chamber such that suction caused by the air jet draws the external air into the plenum chamber to provide a plenum chamber air and draws the plenum chamber air from the plenum chamber into the ejector mixing chamber and out of the trailing edge slot to create an ejected large volume jet of cool air comprising an increased volume jet of air of the air jet and the external air cooled only by mixing action of the air jet, the increased volume jet of air continually generated in the elector mixing chamber by mixing and exchanging momentum of high velocity air of the air jet with the plenum chamber air.