Double swirl burner

A double swirl burner, comprising:

• an annular air nozzle, the annular air nozzle comprising:
• at least one first inlet port on a peripheral wall of the annular air nozzle, the first inlet port configured to allow for tangentially injecting a first air stream into the annular air nozzle, the first air stream tangential to a circular cross-section of the annular air nozzle;
• and
• a first axial inlet configured to allow for axially injecting a second airstream into the annular air nozzle along a centerline of the annular air nozzle;
• an annular fuel nozzle coaxially disposed within the annular air nozzle, the annular fuel nozzle comprising an axial fuel inlet, the axial fuel inlet configured to allow for axially injecting a fuel stream along a centerline of the annular fuel nozzle;
• and
• a central air nozzle coaxially disposed within the annular fuel nozzle, the central air nozzle comprising:
• at least one second inlet port on a peripheral wall of the central air nozzle, the second inlet port configured to allow for tangentially injecting a third air stream into the central air nozzle, the third stream tangential to a circular cross-section of the central air nozzle;
• and
• a second axial inlet configured to allow for axially injecting a fourth air stream into the central air nozzle along a centerline of the central air nozzle.