Shrouded turbofan bleed duct

Details Shrouded turbofan bleed duct Shrouded turbofan bleed duct

2005-12-08

2009-10-27

Cuff, Michael (Department: 3741)

Power plants

Combustion products used as motive fluid

For nominal other than power plant output feature

C060S795000, C060S226100

Reexamination Certificate

active

07607308

ABSTRACT:
A bleed duct is configured for bleeding fan air from the fan bypass duct in a turbofan aircraft engine. The bleed duct includes a tubular conduit having an inlet and outlet at opposite ends. The conduit is configured in flow area for recovering pressure from speeding fan air bled therethrough. A shroud extends forwardly from the duct inlet for suppressing dynamic pressure oscillations inside the conduit without degrading the pressure recovery.

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GE Aircraft Engines, “CF6-80C2 Engine Airflow FADEC Control,” On sale and in public use in the USA for more than one year before Oct. 2005, single page.

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