Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Gerard J Bayle Laboure

Denis J Sandelis

Denis R Ansart

Roger A Vandenbroucke

Jacques L Maunand

Buisson, Marc F B

A system for reducing nitrogen oxide emissions from a gas turbine engine is disclosed in which a portion of air in the air compressor is tapped and supplied to an inlet which introduces at least a portion of the tapped air into the primary zone of the combustion chamber. A control device is disposed between the tap and the inlet to control the air flow passing to the inlet. The inlet is located so as to inject the tapped air into the combustion chamber primary zone at the intersection of adjacent fuel sprays. The control device, which may be an adjustable flap valve or a three-way valve, may also be operatively connected to the throttle control for the gas turbine engine such that the control allows the maximum amount of air to pass into the combustion chamber under full power conditions. The control device is preferably mounted outside the engine casing enclosing the combustion chamber to allow easy access for assembly and maintenance.

System for reducing nitrogen-oxide emissions from a gas turbine engine

A flame holder device of the type having a flame holder ring with a contius cross section of revolution in the shape of a U or V, and a plurality of flame holder arms having a continuous cross section in the shape of a U or V and radiating from one of the flanks of the ring. According to the invention, each arm is attached to the ring by means of gussets which provide for a slight spacing of the arm from the ring in order to prevent local overheating of the ring due to the recirculation of combustion gases.

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Avon, France

Gerard J Bayle Laboure