초록 ▼

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 an

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, each vane is aligned with the direction of normal, positive air flow in the duct, while in its closed position it extends generally 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.

대표청구항 ▼

In a jet turbofan engine having an axial flow central core engine surrounded by an inner wall and a fan bypass duct concentric with said core engine and defined between said inner wall and an outer wall, stall elimination means, comprising: pairs of generally parallel struts arranged in an annular r

In a jet turbofan engine having an axial flow central core engine surrounded by an inner wall and a fan bypass duct concentric with said core engine and defined between said inner wall and an outer wall, stall elimination means, comprising: pairs of generally parallel struts arranged in an annular row and individually in the general direction of air flow through said bypass duct; and a series of freely-rotatable airfoil-shaped vanes, each vane disposed between one of said pairs of struts and mounted between said inner and outer walls for rotation between an open position in which it is aligned with positive air flow in the bypass duct, generally parallel with said pair of struts, and a substantially closed position in which it extends generally across the duct blocking most reverse air flow in said bypass duct.