Accession Number : ADD011217

Title :   Stall Elimination and Restart Enhancement Device.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Stephens,F D

Report Date : 24 Jul 1984

Pagination or Media Count : 4

Abstract : Stall elimination means in a jet turbofan engine includes a plurality of pairs of generally parallel case struts arranged in an annular row in an annular fan bypass duct of the engine, and a series of freely-rotatable vanes, each vane disposed between a pair of the struts and movable between open and closed positions. In its open position, air flow in the duct, while in its closed position it extends generaly across the duct and blocks most reverse air flow in the duct. The vane automatically rotates to the closed position in response to the onset of an adverse pressure gradient in the duct.

Descriptors :   *Patents, *Turbofan engines, *Engine starters, Aircraft engine ducts, Closures, Guide vanes, Rotation, Pressure gradients, Adverse conditions, Air flow, Blocking, Stalling, Elimination, Starting, Augmentation, Struts, Parallel orientation, Setting(Adjusting), Alignment

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE