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US5148667A Expired / Lapsed US ⏱️ 0.0 years remaining

Gas turbine flame diagnostic monitor

Assignee: Electric Power Research Institute
•
Filing: 1990-02-01
•
Granted: 1992-09-22
•
Expires: 2010-02-01
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Abstract

Abstract A gas turbine flame diagnostic monitor has been described incorporating a plurality of viewing probes to be positioned in a plurality of combustors of a gas turbine and coupled to a plurality of optical fiber image guides for transferring the image from each viewing probe to a video camera. The video camera is coupled to a monitor for displaying the flame received by each combustor probe. A video analyzer generates flame intensity patterns, centroids and second order moments and compares them with predetermined stored flame intensity patterns, centroids and second order moments, and logic for providing diagnostic interpretations of the operation of the gas turbine which is coupled to a turbine controller for controlling the gas turbine to provide balanced combustor operation for optimum temperature of the exhaust gases at the first blade row and to warn station operators of impending problems and shut down the turbine at times when turbine malfunctions are observed. The flame diagnostic monitor overcomes the problem of diagnosing faults in the combustors of gas turbines, and also helps prevent subsequent duct explosions during start up when ignition does not occur in a combustor.

Inventors

  • 👤 William W. Morey

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 22:29
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F02; F02C; F02C9/00; F23N5/24; F23N5/242; F05; F05D; F05D2270/00; F05D2270/01; F05D2270/08; F05D2270/083; F23N2229/00; F23N2229/20; F23N2231/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 100 words
A method for detecting the malfunction of a gas turbine during ignition, start up and under torque load comprising the steps of: optically viewing the entire flame in each combustor of said gas turbine, determining a flame pattern based on electromagnetic radiation from the flame as a function of position in the field of view in each combustor, and comparing the flame pattern of each combustor with a plurality of predetermined flame patterns, and determining a diagnosis of malfunction associated with one or more combustors of said turbine by the individual and total combustor correlated with the predetermined flame patterns.
Claim 2
Independent Claim 100 words
A method for detecting the malfunction of a gas turbine during ignition, start up and under torque load comprising the steps of: optically viewing the entire flame in each combustor of said gas turbine, determining a flame pattern based on electromagnetic radiation from the flame as a function of position in the field of view in each combustor, and comparing the flame pattern of each combustor with a plurality of predetermined flame patterns, and determining a diagnosis of malfunction associated with one or more combustors of said turbine by the individual and total combustor correlated with the predetermined flame patterns.
Claim 3
Dependent Claim 51 words
The method of claim 1 further including the steps of combining individual flame patterns of two or more combustors to form a composite flame pattern, and determining a diagnosis of malfunction associated with one or more combustors of said turbine by the composite flame pattern correlated with said predetermined flame patterns.
Claim 4
Independent Claim 115 words
A method for detecting the malfunction of a gas turbine during ignition, start-up and under torque load comprising the steps of: optically viewing the entire flame in two or more combustors of said gas turbine, determining a flame pattern based on electromagnetic radiation rom the flame as a function of position in the field of view in each said combustor, and combining individual flame patterns of two or more combustors to form a composite flame pattern, comparing said composite flame pattern with a predetermined plurality of flame patterns, and determining a diagnosis of malfunction associated with one or more combustors of said turbine by the individual composite flame pattern correlated with said predetermined flame patterns.
Claim 5
Independent Claim 115 words
A method for detecting the malfunction of a gas turbine during ignition, start-up and under torque load comprising the steps of: optically viewing the entire flame in two or more combustors of said gas turbine, determining a flame pattern based on electromagnetic radiation rom the flame as a function of position in the field of view in each said combustor, and combining individual flame patterns of two or more combustors to form a composite flame pattern, comparing said composite flame pattern with a predetermined plurality of flame patterns, and determining a diagnosis of malfunction associated with one or more combustors of said turbine by the individual composite flame pattern correlated with said predetermined flame patterns.

References Cited (Backward Citations)

US3504490A Cited
US4041694A Cited
US4414804A Cited
US4644173A Cited
JPS6459423A Cited
JPH0264232A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-09-22 1996-03-23 1996-09-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-09-22 2000-03-23 2000-09-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-09-22 2004-03-23 2004-09-22 $7700.00 Window Closed / Lapsed

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