Swirl stabilized high capacity duct burner

An air spinner for use in a duct burner, the air spinner comprising:

• a hub defining a fuel path having a fuel path axis;
• a plurality of blades extending radially from the hub so as to establish an air flow path between the blades, and each blade of the plurality of blades is configured so as to be disposed at a non-perpendicular and non-parallel angle relative to the air flow path so that the plurality of blades impart rotation to air flowing between the blades;
• a nozzle extending through the hub and coupled to a fuel runner in communication with a fuel outlet, where the nozzle comprises a body having a sidewall that defines a nozzle channel having an open first end and a substantially closed second end, where the first end is configured to be coupled to the fuel runner with the nozzle channel in communication with the fuel outlet;
• and
• a plurality of fuel passages extending through the sidewall in a downstream direction extending from the nozzle first end to the second end at an angle between 20 and 89 degrees relative to a nozzle channel axis, wherein the fuel path axis is coaxial with the nozzle channel axis and wherein the fuel passages are configured to be complementary to the rotation of the air that is rotated by the blades such that fuel injected through the fuel passages rotates with the air that is rotated by the blades.