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AssigneeThe United States of America as represented by the United States Department of Energy
InventorsJimmy Dean Thornton, George Alan Richards, Douglas L. Straub, Eric Arnold Liese, John Lee Trader, Jr., George Edward Fasching
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A sensor for detecting the flame occurring during a flashback condition in the fuel nozzle of a lean premix combustion system is presented. The sensor comprises an electrically isolated flashback detection electrode and a guard electrode, both of which generate electrical fields extending to the walls of the combustion chamber and to the walls of the fuel nozzle. The sensor is positioned on the fuel nozzle center body at a location proximate the entrance to the combustion chamber of the gas turbine combustion system. The sensor provides 360° detection of a flashback inside the fuel nozzle, by detecting the current conducted by the flame within a time frame that will prevent damage to the gas turbine combustion system caused by the flashback condition.
A system for detecting a flashback condition in a fuel nozzle of a lean premix combustion apparatus, the system comprising:
A sensor for detecting a flashback condition in a combustion system, the sensor comprising first and second electrodes, an electronic circuit, an electrically and thermally insulating body portion having a relatively smooth surface, the first and second electrodes being operably connected to the electronic circuit, and the first and second electrodes being situated on the relatively planar surface of the body portion in a spaced apart and physically isolated relationship one from the other, whereby upon the occurrence of a flashback condition the first and second electrodes will forward to the electronic circuit a signal indicating that the flashback condition exists.
A method for signaling a flashback condition in a fuel nozzle of a combustion system using an electronic detector having a sensor electrode and a guard electrode arranged in a coplanar but spaced apart manner on the surface of an insulating detector body, and an electronic detector circuit, the method comprising the steps of:
A method for detecting a flashback condition in a lean premix fuel nozzle of a gas turbine apparatus using an electronic detector and an electronic detector circuit, the detector having a first electrode and a second electrode arranged in a coplanar but spaced apart manner on the surface of an insulating body, the method comprising the steps of:
Dependencies are inferred from the claim text.