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Apparatus and method for controlling the secondary injection of fuel

United States Patent

March 5, 2013
View the Complete Patent at the US Patent & Trademark Office
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A combustor (28) for a gas turbine engine is provided comprising a primary combustion chamber (30) for combusting a first fuel to form a combustion flow stream (50) and a transition piece (32) located downstream from the primary combustion chamber (30). The transition piece (32) comprises a plurality of injectors (66) located around a circumference of the transition piece (32) for injecting a second fuel into the combustion flow stream (50). The injectors (66) are effective to create a radial temperature profile (74) at an exit (58) of the transition piece (32) having a reduced coefficient of variation relative to a radial temperature profile (64) at an inlet (54) of the transition piece (32). Methods for controlling the temperature profile of a secondary injection are also provided.
Martin; Scott M. (Titusville, FL), Cai; Weidong (Oviedo, FL), Harris, Jr.; Arthur J. (Orlando, FL)
Siemens Energy, Inc. (Orlando, FL)
12/ 194,611
August 20, 2008
STATEMENT REGARDING FEDERALLY SPONSORED DEVELOPMENT Development for this invention was supported in part by Contract No. DE-FC26-05NT42644, awarded by the United States Department of Energy. Accordingly, the United States Government may have certain rights in this invention.