Surge detector for gas turbine engines

摘要

Sensed engine inlet temperature is utilized to detect compressor surge whenever its computed temperature rate of change or rise signal exceeds a predetermined value. This signal may be coupled to another engine operating parameter, such as rotor speed, compressor discharge pressure and the like and permutations thereof, to guard against false detection. Engine inlet temperature rate of change or rise is an efficacious surge detection parameter particularly when an afterburner is used inasmuch as the hot gases of the afterburner will have a significant influence on the engine inlet temperature sensor in a reverse flow situation making that signal a positive indication of imminent surge.