초록 ▼

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 wal

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.degree. 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.

대표청구항 ▼

1. A system for detecting a flashback condition in a fuel nozzle of a lean premix combustion apparatus, the system comprising:a sensor positioned in the fuel nozzle, said sensor including a first electrode and a second electrode held in a coplanar but spaced apart manner by an insulating body, at le

1. A system for detecting a flashback condition in a fuel nozzle of a lean premix combustion apparatus, the system comprising:a sensor positioned in the fuel nozzle, said sensor including a first electrode and a second electrode held in a coplanar but spaced apart manner by an insulating body, at least a portion of the first and second electrodes being exposed to gases flowing through the fuel nozzle; and a control circuit coupled to said first and second electrodes, the circuit being capable both of causing electrical fields to radiate 360.degree. from the electrodes to the walls of the fuel nozzle and the combustion chamber and receiving from the electrodes an electronic signal indicating the occurrence of a flashback condition in the fuel nozzle.