FLAME MONITORING OF A GAS TURBINE COMBUSTOR USING A CHARACTERISTIC SPECTRAL PATTERN FROM A DYNAMIC PRESSURE SENSOR IN THE COMBUSTOR

摘要

The state of a flame in a gas turbine engine combustor is acoustically monitored using a dynamic pressure sensor within the combustor. A spectral pattern of a dynamic pressure sensor output signal from the sensor is compared with a characteristic frequency pattern that includes information about an acoustic pattern of the flame and information about acoustic signal canceling due to reflections within the combustor. The spectral pattern may also be compared with a characteristic frequency pattern including information about a flame-out condition in the combustor.