Abstract: Characteristics of a flame within a turbine or burner are determined based upon ultraviolet, visible, and infrared measurements of the flame. The measurements include a measurement of the amplitude of frequency bands that are indicative of an efficient combustion process, such as those that increase when the flame temperature increases. The measurements also include of the amplitude of frequency bands that are indicative of an inefficient combustion process, such as those that do not vary, increase a relatively small amount, or decrease when the flame temperature increases. The temperature of the flame may therefore be determined accurately, to facilitate efficient operation of the turbine or burner while minimizing polluting emissions. Contaminants in the turbine or burner are detected, and a degree of contamination measured, by detection of energy levels for particular wavelengths associated with a respective contaminant.

Abstract: Characteristics of a flame within a turbine or burner are determined based upon ultraviolet, visible, and infrared measurements of the flame. The measurements include the amplitude of frequency bands that are indicative of an efficient combustion process, such as those that increase when the flame temperature increases. The measurements also include the amplitude of frequency bands that are indicative of an inefficient combustion process, such as those that do not vary, increase a relatively small amount, or decrease when the flame temperature increases. The temperature of the flame may therefore be determined accurately, to facilitate efficient operation of the turbine or burner, while minimizing polluting emissions.

Abstract: A high temperature gas stream optical flame sensor for flame detection in gas turbine engines, and method for fabricating same is provided. The sensor generally comprises a silicon carbide photodiode and silicon carbide based amplification hardware for generating a signal indicative of the presence of the flame. In a preferred embodiment, the photodiode and amplification hardware are disposed within a sensor housing and the photodiode is situated within a fuel/air premixer.

Abstract: A high temperature gas stream optical flame sensor for flame detection in gas turbine engines, and method for fabricating same is provided. The sensor generally comprises a silicon carbide photodiode and silicon carbide based amplification hardware for generating a signal indicative of the presence of the flame. In a preferred embodiment, the photodiode and amplification hardware are disposed within a sensor housing and the photodiode is situated within a fuel/air premixer.