A burner having an air intake, a premix manifold, a blast tube, a rich fuel manifold, and a pilot. The blast tube includes a diffuser, an auxiliary passage, and a shutter. The shutter has at least an open position allowing air and fuel mixtures to flow through the auxiliary passage and the diffuser, and a closed position allowing flow through only the diffuser. Air moves from the air intake to the premix manifold where it mixes with a first fuel. The mixture moves through the blast tube and is ignited by the pilot, forming a lean center flame. A second fuel moves through the rich fuel manifold and ignites via the lean center flame, forming a rich secondary flame. The lean center flame and rich secondary flame combine to form a first flame.

A burner having an air intake, a premix manifold, a blast tube, a rich fuel manifold, and a pilot. The blast tube includes a diffuser, an auxiliary passage, and a shutter. The shutter has at least an open position allowing air and fuel mixtures to flow through the auxiliary passage and the diffuser, and a closed position allowing flow through only the diffuser. Air moves from the air intake to the premix manifold where it mixes with a first fuel. The mixture moves through the blast tube and is ignited by the pilot, forming a lean center flame. A second fuel moves through the rich fuel manifold and ignites via the lean center flame, forming a rich secondary flame. The lean center flame and rich secondary flame combine to form a first flame.

The invention relates to a nozzle assembly for a combustor of an engine, including at least one nozzle for injecting fuel into a combustion chamber of the combustor, wherein the nozzle has a nozzle main body which extends along a nozzle longitudinal axis and a nozzle holder connected to the nozzle main body and having at least one fuel supply line. The nozzle main body comprises a central fuel pipe extending along the nozzle longitudinal axis and sealed against an in-flow of air, in which fuel supplied via the at least one fuel supply line can be guided within the nozzle main body up to a fuel outlet opening of the fuel pipe provided at a nozzle end of the nozzle, via which the fuel can be introduced into the combustion chamber.

A burner apparatus is disclosed. The burner apparatus comprising a tube having a proximal portion, a middle portion, and a distal portion, a fuel inlet port adapted to receive fuel inside the tube. The fuel inlet port splits into a first conduit and a second conduit, an air inlet port receives air inside the tube, at least one air swirler unit positioned at the middle portion of the tube, generates a swirling air flow and an axial air flow from the air received, a block having a plurality of staged fuel tips, receives fuel from the second conduit. The block discharges a primary flame by containing the fuel received from the first conduit and the swirling air flow, and provide for a secondary flame by directing the fuel received from the plurality of staged fuel tips into the primary flame downstream of the primary flame attachment point.

A burner apparatus is disclosed. The burner apparatus comprising a tube having a proximal portion, a middle portion, and a distal portion, a fuel inlet port adapted to receive fuel inside the tube. The fuel inlet port splits into a first conduit and a second conduit, an air inlet port receives air inside the tube, at least one air swirler unit positioned at the middle portion of the tube, generates a swirling air flow and an axial air flow from the air received, a block having a plurality of staged fuel tips, receives fuel from the second conduit. The block discharges a primary flame by containing the fuel received from the first conduit and the swirling air flow, and provide for a secondary flame by directing the fuel received from the plurality of staged fuel tips into the primary flame downstream of the primary flame attachment point.