General Electric Company

Kenneth Paul Onderko

James Dale Steibel

Peter Nicholas Szucs

Nicholas Damlis

Dale Bradley Elliott

An air bleed assembly for extracting air from a flowpath in a gas turbine engine includes a casing for surrounding a row of circumferentially spaced apart rotor blades and defining at least in part the flowpath for receiving air compressed by the rotor blades. The casing includes a bleed port disposed downstream of a row of the blades for receiving a portion of the compressed air as bleed airflow and a bleed duct extending away from the bleed port. The bleed duct has an annular slot in the casing. The annular slot has annular slot leading and trailing edges and an annular bifurcated splitter disposed along at least a portion of the annular slot trailing edge. The bifurcated splitter has an annular leading edge forebody located upstream of and separated from an annular splitter wall by an annular return channel. In one embodiment of the invention, the rotor blades are fan blades and the annular bleed space is in the flowpath in a fan section of the engine. The annular bleed space is located between a fan variable vane disposed across the flowpath and one of the fan blades located downstream of the fan variable vane.

Bifurcated splitter for variable bleed flow

A composite article is fabricated by preparing a porous first region piece having a first reinforcement material with no matrix, and rigidizing the first reinforcement material to form a porous first coated preform. At least one second-region layer of a second reinforcement material having no matrix is applied in contact with at least a portion of the first coated preform. The second reinforcement material is rigidized, to form a second coated preform. A second-region matrix material is deposited into at least some of the porosity of the second coated preform. The reinforcement material may be silicon carbide fibers, and the infiltrated matrix may be silicon carbide.

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Hamilton, OH, United States of America

Kenneth Paul Onderko