Anti-flameout safety system for a gas turbine engine
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorPierre C. Mouton
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Abstract
An anti-flameout safety system for a gas turbine engine is disclosed which prevents engine flameout in the event of ingestion of hail and/or water through the engine intake. The anti-flameout safety system has a detector to detect the water concentration in the engine which generates a signal when the water concentration is at or above a predetermined level and an engine control means which is associated with the detector such that, when the detector generates the signal, the engine control means automatically increases the engine power output.
Claims13
An anti-flameout safety system for a gas turbine engine to prevent engine flameout in the event of entry of hail or water through the engine intake wherein the gas turbine engine has a compressor with an intake and an outlet, comprising:
- a) a first detector to detect the water concentration in the compressor of the engine, the first detector generating a signal when the water concentration is at or above a predetermined level wherein the first detector comprises:
- i) a first temperature measurement device to measure the temperature T.sub.3 of the gases at the compressor outlet;
- ii) a second temperature measurement device to measure the temperature T.sub.2 of the gases at the compressor intake;
- iii) a speed measuring device to measure the engine rotational speed N;
- iv) a calculating device operatively connected to the first and second temperature measurement devices and the speed measuring device to calculate an operating point based on the temperature difference (T.sub.3 -T.sub.2) as a function of the rotational speed N;
- and,
- v) a comparator operatively associated with the calculating device to compare the calculated operating point with a predetermined critical operating point for a given engine speed N;
- and,
- b) an engine controller operatively associated with the gas turbine engine and the first detector to automatically raise the engine power output when the first detector generates the signal.
An anti-flameout safety system for a gas turbine engine to prevent engine flameout in the event of entry of hail or water through the engine intake, comprising:
- a) a first detector to detect the water concentration in the engine, the first detector generating a signal when the water concentration is at or above a predetermined level;
- b) an engine controller operatively associated with the gas turbine engine and the first detector to automatically raise the engine power output when the first detector generates the signal;
- and,
- c) a second detector operatively interposed between the first detector and the engine controller so as to detect water concentration independently of the first detector when receiving the signal generated by the first detector means and to generate a signal to the engine controller if the water concentration is at or above a predetermined value.
Dependencies are inferred from the claim text.