Optical sensing of combustion dynamics
AssigneeGeneral Electric Company
InventorsEmily Y. Shu, Dale M. Brown
Life of this patent
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Abstract
An optical radiation detector, such as a silicon carbide photodiode ultraviolet radiation detector, is employed for real time, noninvasive monitoring and diagnosis of combustion dynamics in gas turbine engines. The SiC photodiode responds to flame ultraviolet emission, and a Fast Fourier Transform spectrum analyzer peak acoustic frequency components of the detector signal as indicators of systematic gas pressure vibrations related to combustion. The combustion may be modified in accordance with the monitored acoustic frequency components.
Claims20
A system for monitoring combustion dynamics within a gas turbine combustor, comprising:
- an optical radiation detector for detecting optical emission from a combustion flame in the combustor to produce a detector signal;
- and
- apparatus for recognizing at least one peak frequency component of the detector signal as an indicator of a systematic gas pressure vibration related to combustion.
A method of monitoring combustion dynamics within a gas turbine combustor, comprising:
- detecting optical emission from a combustion flame in the combustor to produce a detector signal;
- and
- monitoring at least one peak frequency component of the detector signal as an indicator of a systematic gas pressure vibration related to combustion.
A method of monitoring combustion dynamics within a gas turbine combustor, comprising:
- detecting optical emission from a combustion flame in the combustor to produce a detector signal;
- and
- monitoring a plurality of peak frequency components of the detector signal as an indicator of a systematic gas pressure vibration related to combustion.
Dependencies are inferred from the claim text.