US 7,320,213 B2 | ||
System for identification of hot and cold chambers in a gas turbine combustor | ||
Minesh Ashok Shah, Clifton Park, N.Y. (US); Ajai Singh, Clifton Park, N.Y. (US); Willy Steve Ziminsky, Simpsonville, S.C. (US); and Derrick Simons, Greer, S.C. (US) | ||
Assigned to General Electric Company, Schenectady, N.Y. (US) | ||
Filed on Apr. 30, 2007, as Appl. No. 11/742,069. | ||
Application 11/742069 is a division of application No. 10/980795, filed on Nov. 04, 2004, granted, now 7,210,297. | ||
Prior Publication US 2007/0199328 A1, Aug. 30, 2007 | ||
Int. Cl. F02C 9/00 (2006.01) |
U.S. Cl. 60—39.281 | 20 Claims |
1. A system for ranking combustion chambers in a gas turbine in order of chamber combustion temperature comprising:
at least one fuel nozzle supplying fuel to the combustion chambers at a predetermined fuel rate abnormally near a lean blow
out (LBO) condition of the chambers;
at least one dynamic pressure sensor in each chamber sensing combustion dynamic pressures in said combustion chambers and
generating dynamic pressure signals representative of the dynamic pressure in each of said combustion chambers, wherein the
dynamic pressure signals provide information regarding the dynamic pressure at a plurality of frequencies;
a signal band pass filter segmenting the signals into a plurality of predefined frequency bands comprising a lean blow out
(LBO) precursor frequency band, a cold tone frequency band and a hot tone frequency band;
a processor determining a value for each chamber representative of amplitudes of the signals in each of LBO precursor frequency
band, the cold tone frequency band and the hot tone frequency band, wherein the value is characteristic of a combustion temperature
within the chamber, and said processor ranking a plurality of the combustion chambers in an order of the combustion temperature.
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