MULTI FUNCTIONAL SENSOR SYSTEM FOR GAS TURBINE COMBUSTION MONITORING AND CONTROL

摘要

Thermoacoustic sensors, such as dynamic pressure sensors, in the combustor measure vibratory responses of the combustor. An integrated monitoring and control system controller correlates sensor readings with combustion thermoacoustic properties in order to identify combustion anomalies by wavelet or Fourier analysis techniques; determine bulk temperature characteristics within the combustor with dominant mode frequency analysis techniques; and optionally determines absolute active path temperatures within the combustor with acoustic pyrometry transmission and time-of-flight analysis techniques. In some embodiments all of the monitoring functions are performed with a commonly shared array of thermoacoustic sensors that function as both combustion dynamics thermoacoustic vibration/wave receivers and acoustic transmitters. The monitored combustion properties are used for controlling gas turbine combustion.

主权项

1. A method for detecting and classifying combustion anomalies in a combustor of a gas turbine engine, comprising:
placing in a gas turbine combustor at least two thermoacoustic sensors capable of generating respective sensor output signals indicative of combustion thermoacoustic oscillations in the combustor and coupling the sensors to a controller that is capable of correlating sensor output signals with combustion conditions; generating dynamic sensor output signals with the thermoacoustic sensors; performing a wavelet or Fourier spectral analysis of the dynamic sensor output signals with the controller, to determine whether a combustion anomaly has occurred; monitoring temperature within the combustor with the thermoacoustic sensors by performing one or both of: bulk temperature frequency analysis of the dynamic sensor output signals; or active path temperature monitoring of the dynamic sensor output signals by acoustic pyrometry; and classifying the anomaly with the controller based on the wavelet or the Fourier spectral analysis and the monitored temperature.