Joseph W Savage

US Patent:

53618289, Nov 8, 1994

Filed:

Feb 17, 1993

Appl. No.:

8/019238

Inventors:

Joseph W. Savage - Maineville OH
Melvin Bobo - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F28F 1312

US Classification:

1651091

Abstract:

A heat transfer surface for use along a flowpath along the surface is scaled with rows of turbulators having ramp surfaces protruding into the flowpath operable to generate turbulence promoting vortices. The ramp surfaces may be oriented to present an upward or downhill ramp to the direction of the flowpath along the surface. The present invention is further characterized by triangular side surfaces which precipitous drop off from a top ramp surface to the base of the turbulator along the heat transfer surface. The preferred embodiment of the present invention provides a three sided pyramid shaped turbulator with a ramp downhill surface wherein the sharp edge at the intersection of the two precipitous side surfaces is a leading edge into the flowpath on the heat transfer surface. Alternate embodiments include turbulators with triangular and rectangular uphill ramp surfaces.

US Patent:

59316365, Aug 3, 1999

Filed:

Aug 28, 1997

Appl. No.:

8/919520

Inventors:

Joseph W. Savage - Maineville OH
Ely E. Halila - Cincinnati OH
Robert J. Orlando - West Chester OH
Valentine R. Boehm - Cincinnati OH
James A. Martus - West Chester OH
Thomas T. Wallace - Maineville OH
Monty L. Shelton - Loveland OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F01D 1716

US Classification:

415115

Abstract:

A variable area turbine nozzle includes a plurality of circumferentially adjoining nozzle segments. Each nozzle segment includes outer and inner bands, with a plurality of first vane segments fixedly joined therebetween. A plurality of second vane segments adjoin respective ones of the first vane segments to define therewith corresponding vanes which are spaced apart to define respective throats of minimum flow area for channeling therethrough combustion gas. The second vane segments are pivotable to selectively vary the throat area.