Richard J Borkowicz

US Patent:

51933462, Mar 16, 1993

Filed:

Jun 18, 1992

Appl. No.:

7/899586

Inventors:

Masayoshi Kuwata - Ballston Lake NY
Cheryl Mele - Schenectady NY
Richard J. Borkowicz - Ballston Spa NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23R 334
F02C 722

US Classification:

60737

Abstract:

A dual mode, dual stage low NOx combustor, includes a primary combustion chamber and a secondary combustion chamber separated by a throat region of reduced diameter. Fuel is input into the primary combustors by an annular array of diffusion type nozzles whereas in accordance with the invention, fuel is input into the secondary combustor by a central combination premix and diffusion nozzle. A premix swirler annulus is located upstream of a plurality of fuel distribution tubes of the combined premix and diffusion nozzle.

US Patent:

51992655, Apr 6, 1993

Filed:

Apr 3, 1991

Appl. No.:

7/680073

Inventors:

Richard J. Borkowicz - Ballston Spa NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23R 334

US Classification:

60737

Abstract:

A secondary nozzle for a gas turbine includes an elongated, tubular nozzle body having an inlet end and an outlet end; a tubular core assembly having an outer diameter less than an interior diameter of the tubular nozzle body to thereby define a diffusion fuel passage between the core assembly and the tubular nozzle body extending to the outlet end, and a premix fuel passage through the core assembly extending to a pilot orifice at the outlet end; an air passage located along at least a portion of the tubular nozzle body and located radially between the diffusion and premix fuel passages; and, a plurality of gas injectors extending radially out of the elongated tubular nozzle body from the premix fuel passage.

US Patent:

52591840, Nov 9, 1993

Filed:

Mar 30, 1992

Appl. No.:

7/859006

Inventors:

Richard Borkowicz - Westminster MD
David T. Foss - Schenectady NY
Daniel M. Popa - Schenectady NY
Warren J. Mick - Altamont NY
Jeffery A. Lovett - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23R 336
F02C 320

US Classification:

60 3955

Abstract:

In a gas turbine (10), a plurality of combustors (14), each having a plurality of fuel nozzles (32) arranged about a longitudinal axis of the combustor, and a single combustion zone (70), each fuel nozzle having a diffusion passage (74) and a premix passage (60), the premix passage communicating with a plurality of premix fuel distribution tubes (66) located within a dedicated premix tube (46) adapted to mix the premix fuel and combustion air prior to entry into the single combustion zone (70) located downstream of the premix tube (46).

US Patent:

54872758, Jan 30, 1996

Filed:

Dec 11, 1992

Appl. No.:

7/987957

Inventors:

Richard J. Borkowicz - Westminster MD
L. Berkley Davis - Schenectady NY
Masayoshi Kuwata - Ballston Lake NY

Assignee:

General Electric Co. - Schenectady NY

International Classification:

F02C 314

US Classification:

60747

Abstract:

An improved gas turbine combustor of the type including primary and secondary combustion chambers with a venturi including a throat portion located therebetween; a plurality of primary fuel injection nozzles secured to a combustor cap in an annular array upstream of the primary combustion chamber; and a centerbody including a secondary fuel nozzle, said centerbody extending from said combustor cap to said secondary combustion chamber; the improvement comprising a plurality of tertiary fuel injection nozzles arranged in a circular array about a longitudinal axis of the combustor, at a location downstream of said venturi throat portion, for injecting fuel into the secondary combustion chamber.

US Patent:

55751466, Nov 19, 1996

Filed:

May 5, 1995

Appl. No.:

8/435293

Inventors:

Richard J. Borkowicz - Westminster MD
L. Berkley Davis - Schenectady NY
Masayoshi Kuwata - Ballston Lake NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F02C 7228

US Classification:

60 3906

Abstract:

An improved gas turbine combustor of the type including primary and secondary combustion chambers with a venturi including a throat portion located therebetween; a plurality of primary fuel injection nozzles secured to a combustor cap in an annular array upstream of the primary combustion chamber; and a centerbody including a secondary fuel nozzle, said centerbody extending from said combustor cap to said secondary combustion chamber; the improvement comprising a plurality of tertiary fuel injection nozzles arranged in a circular array about a longitudinal axis of the combustor, at a downstream of said venturi throat portion, for injecting fuel into the secondary combustion chamber.