Burner and method for transient heating

A burner for transient heating of a furnace, the burner comprising:

• a burner face configured to be positioned at an inner surface of the furnace when the burner is mounted in the furnace, the burner face defining a burner face plane;
• a first burner element having a first annular nozzle configured to flow primary oxidant surrounding a first inner nozzle configured to flow fuel;
• a second burner element having a second annular nozzle configured to flow primary oxidant surrounding a second inner nozzle configured to flow fuel, the second burner element being positioned adjacent to and spaced apart from the first burner element;
• a staging nozzle configured to flow secondary oxidant, the staging nozzle being positioned adjacent to and spaced apart from the second burner element,
• wherein the second burner element is positioned between the staging nozzle and the first burner element;
• wherein the first inner nozzle and the second inner nozzle each have a major axis defined by a major axis length L measured at the burner face plane, a minor axis defined by a minor axis height hf measured at the burner face plane, and a fuel nozzle aspect ratio of 5<=L/hf<=15;
• wherein the staging nozzle has a major axis defined by a major axis length X measured at the burner face plane and a minor axis defined by a minor axis height Y measured at the burner face plane;
• and
• wherein the major axis of the first inner nozzle, the major axis of the second inner nozzle, and the major axis of the staging nozzle are substantially parallel with each other to within a deviation of less than or equal to 5°.