Richard L Koch

US Patent:

61859257, Feb 13, 2001

Filed:

Feb 12, 1999

Appl. No.:

9/249206

Inventors:

Robert Proctor - West Chester OH
Michael J. Epstein - Mason OH
Gordon G. Fraser - Cincinnati OH
Scott E. Farley - Kings Mills OH
Richard F. Koch - Loveland OH
Robert W. Siebert - Troy MI

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F02C 300

US Classification:

60 3975

Abstract:

An apparatus for cooling a gas turbine engine annular rear turbine frame includes a first plenum box having an inlet for receiving cooling air and an annular first manifold tube in fluid communication with a first outlet of and extending in a first circumferential direction away from the plenum box. The first manifold tube is circumscribed radially outward of and around a centerline and has axially spaced apart first arcuate sections circumscribed about and perpendicular to the centerline. Each of the first arcuate sections of the first manifold tube has a corresponding portion of a first plurality of impingement cooling holes disposed through the first manifold tube and aimed generally radially inward. In one embodiment the impingement cooling holes are aimed towards a first circumference on the frame and A cooling air bleed is preferably connected to the plenum box with a selectable on and off control valve therebetween.