Jet blade ejector nozzle
AssigneeThe Boeing Company
InventorLarry T. Clark
Life of this patent
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Abstract
A jet engine assembly having a jet engine and an unsteady flow ejector. The unsteady flow ejector segregates the exhaust flow from the jet engine into a plurality of rotating high velocity, low density jets and a plurality of rotating low pressure voids. The low pressure voids are employed to entrain at least a portion of a secondary flow of air which is mixed with the jets to produce a mixed flow having a relatively higher flow rate and a relatively lower velocity than the exhaust flow. A method for attenuating the noise that is produced by the exhaust flow of a jet engine is also provided.
Claims9
A method for reducing the noise emitted by a flow of exhaust from an outlet of a jet propulsion engine having a turbine with a plurality of turbine stages, the method comprising the steps of:
- segregating the exhaust flow into a plurality of rotating high velocity, low density jets and a plurality of rotating low pressure voids;
- and
- employing the low pressure voids to entrain at least a portion of a secondary flow of air, the jets and the entrained secondary flow mixing to produce a mixed flow having a relatively higher flow rate and a relatively lower velocity than the exhaust flow.
Dependencies are inferred from the claim text.