Data processing: measuring – calibrating – or testing – Measurement system – Performance or efficiency evaluation
Reexamination Certificate
2007-03-20
2007-03-20
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Performance or efficiency evaluation
C702S081000
Reexamination Certificate
active
11051885
ABSTRACT:
The present invention comprises systems and methods for determining stability margin of a combustor. One embodiment of the present invention includes the steps of providing a measuring device in communication with the combustor, wherein the measuring device generates signals indicative of combustor quantities; performing an autocorrelation calculation on the signals to determine the correlation time of the signals in the combustor; and determining the damping coefficient from the autocorrelation calculation, wherein the damping coefficient signifies a proximity of the combustor to instability. The damping coefficient may be estimated from the oscillatory envelope of the autocorrelation calculation data.
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Hobson, D.E.., et al., “Combustion Instabilities in Industrial Gas Turbines—Measurements on Operating Plant and Thermoacoustic Modelling”, The American Society of Mechanical Engineers, 99-GT-110.
Georgia Tech Research Corporation
Hoff Marc S.
Suglo Janet L
Sutherland & Asbill & Brennan LLP
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