Power plants – Reaction motor – Interrelated reaction motors
Patent
1976-12-27
1979-05-29
Garrett, Robert E.
Power plants
Reaction motor
Interrelated reaction motors
60269, 415119, 415145, F02K 306
Patent
active
041563441
ABSTRACT:
This invention is an improvement to a turbofan engine intended to reduce fan noise caused by the interaction of the rotor with secondary flow generated by the inlet guide vanes. A portion of the air flowing through the engine is removed from the fan duct from a region between the inlet guide vanes and the rotor and near the outer periphery of the fan duct by a system of bleed ducts. The ducts have one or more openings in the fan casing. The system may also include means for controlling the flow through the bleed ducts and means for injecting high energy flow into the bleed ducts to assist in ejecting the bleed flow.
REFERENCES:
patent: 3632223 (1972-01-01), Hampton
patent: 3730639 (1973-05-01), Moore
Cuthbertson Robert D.
Schaut Larry A.
Donahue B. A.
Garrett Robert E.
Richardson A. R.
The Boeing Company
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