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Methods and systems for combustion dynamics reduction

United States Patent

7,578,130
August 25, 2009
View the Complete Patent at the US Patent & Trademark Office
Methods and systems for combustion dynamics reduction are provided. A combustion chamber may include a first premixer and a second premixer. Each premixer may include at least one fuel injector, at least one air inlet duct, and at least one vane pack for at least partially mixing the air from the air inlet duct or ducts and fuel from the fuel injector or injectors. Each vane pack may include a plurality of fuel orifices through which at least a portion of the fuel and at least a portion of the air may pass. The vane pack or packs of the first premixer may be positioned at a first axial position and the vane pack or packs of the second premixer may be positioned at a second axial position axially staggered with respect to the first axial position.
Kraemer; Gilbert Otto (Greer, SC), Varatharajan; Balachandar (Cincinnati, OH), Srinivasan; Shiva (Greer, SC), Lynch; John Joseph (Wilmington, NC), Yilmaz; Ertan (Albany, NY), Kim; Kwanwoo (Greer, SC), Lacy; Benjamin (Greer, SC), Crothers; Sarah (Greenville, SC), Singh; Kapil Kumar (Rexford, NY)
General Electric Company (Schenectady, NY)
12/ 123,876
May 20, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with the U.S. Government support under contract number DE-FC26-05NT42643 awarded by the U.S. Department of Energy. The U.S. Government has certain rights in this invention.