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

Jacques L Maunand

Denis R Ansart

Denis J Sandelis

Gerard J Bayle Laboure

A fuel injection system for a gas turbine engine combustion chamber is disclosed having a sleeve defining a passageway extending along a longitudinal axis of a combustion zone, a first fuel injector orifice to inject fuel into the passageway, and second fuel injector holes arranged in a plurality of substantially linear arrays extending radially from the sleeve and angularly equidistantly spaced from each other, the second fuel injection holes located in a plane extending substantially perpendicular to the longitudinal axis of the combustion chamber such that the plane is located axially between an upstream end wall of the combustion chamber and the downstream end of the sleeve. The system also includes a flameholder having a plurality of flameholder arms extend axially from second fuel injection arms such that the downstream ends of the flameholder arms extend to at least the downstream end of the sleeve and extend generally radially from the sleeve such that the flameholder arms are circumferentially located between the angularly spaced apart linear arrays of fuel injection holes.

Fuel injection system for a gas turbine combustor including radial fuel

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.

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Saint Forget, France

Jacques L Maunand