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Lean direct injection diffusion tip and related method

United States Patent

August 14, 2012
View the Complete Patent at the US Patent & Trademark Office
A nozzle for a gas turbine combustor includes a first radially outer tube defining a first passage having an inlet and an outlet, the inlet adapted to supply air to a reaction zone of the combustor. A center body is located within the first radially outer tube, the center body including a second radially intermediate tube for supplying fuel to the reaction zone and a third radially inner tube for supplying air to the reaction zone. The second intermediate tube has a first outlet end closed by a first end wall that is formed with a plurality of substantially parallel, axially-oriented air outlet passages for the additional air in the third radially inner tube, each air outlet passage having a respective plurality of associated fuel outlet passages in the first end wall for the fuel in the second radially intermediate tube. The respective plurality of associated fuel outlet passages have non-parallel center axes that intersect a center axis of the respective air outlet passage to locally mix fuel and air exiting said center body.
Varatharajan; Balachandar (Cincinnati, OH), Ziminsky; Willy S. (Simpsonville, SC), Lipinski; John (Simpsonville, SC), Kraemer; Gilbert O. (Greer, SC), Yilmaz; Ertan (Niskayuna, NY), Lacy; Benjamin (Greer, SC)
General Electric Company (Schenectady, NY)
12/ 222,423
August 8, 2008
This invention was made with Government support under Contract No. DE-FC26-05NT42643 awarded by the Department of Energy. The Government has certain rights in the invention.