초록 ▼

An improved exhaust system including a lobed mixer and an improved exhaust centerbody is provided. The improved exhaust centerbody includes means for cooperating with the lobed mixer to increase mixing effectiveness of the exhaust system without substantially increasing pressure losses attributable

An improved exhaust system including a lobed mixer and an improved exhaust centerbody is provided. The improved exhaust centerbody includes means for cooperating with the lobed mixer to increase mixing effectiveness of the exhaust system without substantially increasing pressure losses attributable thereto. In a preferred embodiment of the invention, the cooperating means include a plurality of circumferentially spaced elongated deformations, such as grooves and ridges, which deformations extend radially with respect to a reference surface of the exhaust centerbody and which deformations are aligned in an axial direction substantially parallel to a longitudinal axis of the centerbody.

대표청구항 ▼

A turbofan engine including: a fan; a core engine disposed downstream from said fan and coaxially therewith about an engine longitudinal axis; a core cowl disposed circumferentially about said core engine; an exhaust centerbody extending from an aft end of said core engine and spaced radially inward

A turbofan engine including: a fan; a core engine disposed downstream from said fan and coaxially therewith about an engine longitudinal axis; a core cowl disposed circumferentially about said core engine; an exhaust centerbody extending from an aft end of said core engine and spaced radially inwardly from an inner surface of said core cowl to define a core nozzle for discharging gases from said core engine; and a nacelle disposed circumferentially about said fan and core engine and spaced radially outwardly from said core cowl to define an annular bypass duct for channeling fan air downstream from said fan, said nacelle cooperating with an aft end of said core cowl for defining an annular fan nozzle for discharging fan air from said bypass duct, said nacelle extending downstream from said aft end of said core cowl for defining an exhaust nozzle for discharging both said fan air from said fan nozzle and said gases from said core nozzle; wherein said exhaust centerbody comprises: an annular member having a radially outer surface including forward, intermediate, and aft portions coaxially disposed about a longitudinal axis of said member, said aft portion of said outer surface being inclined radially inwardly in an aft direction from said intermediate portion, said intermediate portion being corrugated, so as to form a plurality of circumferentially spaced grooves and ridges therein, each of said grooves and ridges extending substantially axially in said intermediate portion.