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System and method for reducing combustion dynamics and NO.sub.x in a combustor

United States Patent

9,188,335
November 17, 2015
View the Complete Patent at the US Patent & Trademark Office
A system for reducing combustion dynamics and NO.sub.x in a combustor includes a tube bundle that extends radially across at least a portion of the combustor, wherein the tube bundle comprises an upstream surface axially separated from a downstream surface. A shroud circumferentially surrounds the upstream and downstream surfaces. A plurality of tubes extends through the tube bundle from the upstream surface through the downstream surface, wherein the downstream surface is stepped to produce tubes having different lengths through the tube bundle. A method for reducing combustion dynamics and NO.sub.x in a combustor includes flowing a working fluid through a plurality of tubes radially arranged between an upstream surface and a downstream surface of an end cap that extends radially across at least a portion of the combustor, wherein the downstream surface is stepped.
Uhm; Jong Ho (Simpsonville, SC), Johnson; Thomas Edward (Greer, SC)
GENERAL ELECTRIC COMPANY (Schenectady, NY)
13/ 281,528
20130104556
October 26, 2011
FEDERAL RESEARCH STATEMENT 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.