Combustor Assembly with Trapped Vortex Cavity

A combustor assembly, comprising:

• a bundle of air/fuel premixing injection tubes having an upstream end, a downstream end, and a flow path therebetween;
• an annular trapped vortex cavity located adjacent to the downstream end of the air/fuel premixing injection tubes and defined between an annular aft wall, an annular forward wall, and an annular radially outer wall formed therebetween;
• an annular trapped vortex cavity opening at a radially inner portion of the annular trapped vortex cavity spaced apart from the outer wall and extending between the aft wall and the forward wall;
• one or more air injection holes disposed about the annular trapped vortex cavity;
• one or more fuel sources disposed about the annular trapped vortex cavity;
• and
• wherein the one or more air injection holes and the one or more fuel sources are configured to drive a vortex within the annular trapped vortex cavity.

A combustor assembly, comprising:

• a bundle of air/fuel premixing injection tubes having an upstream end, a downstream end, and a flow path therebetween;
• an annular trapped vortex cavity located adjacent to the downstream end of the air/fuel premixing injection tubes and defined between an annular aft wall, an annular forward wall, and an annular radially outer wall formed therebetween;
• an annular trapped vortex cavity opening at a radially inner portion of the annular trapped vortex cavity spaced apart from the outer wall and extending between the aft wall and the forward wall;
• one or more air injection holes disposed about the annular trapped vortex cavity;
• one or more fuel sources disposed about the annular trapped vortex cavity;
• a combustion chamber surrounded by an annular combustor liner disposed in air flow communication with the bundle of premixing tubes, the annular trapped vortex cavity, the one or more air injection holes, and the one or more fuel sources;
• and
• wherein the one or more air injection holes and the one or more fuel sources are configured to drive a vortex within the annular trapped vortex cavity.