Surge detection in a gas turbine engine

摘要

A method for detecting a surge condition during operation of a gas turbine engine includes detecting an uncommanded momentary change of pressure differential between fuel flows in a fuel system (28) of the engine during engine operation. A differential pressure transducer (52) is connected to a first fluid flow passage (48) supplying fuel to a pilot nozzle (34) and to a second passage (50) supplying fuel to a main manifold (36). An electrical engine control (60) connected to the differential pressure transducer detects the uncommanded momentary change.
An apparatus for detecting a surge condition during operation of a gas turbine engine further includes an indicator (61) for indicating an occurrence of a surge condition in the gas turbine engine upon receipt of a signal relating to the detected uncommanded momentary pressure change.