Burner for a can combustor

A method for operating a burner, the burner comprising:

• a mixing and injection device which includes:
• a limiting wall that defines a gas-flow channel with a longitudinal axis, an inlet area, and downstream of the inlet area in a main-flow direction, an outlet area, wherein the gas-flow channel has a cross-section perpendicular to the main-flow direction, the cross-section being a substantially lensoid or elliptical cross-section;
• and
• at least two streamlined bodies, each extending in a first transverse direction of the burner, from a first region of the limiting wall and perpendicularly to or at an inclination with respect to the main-flow direction into the gas-flow channel, wherein at least two of the at least two streamlined bodies have different lengths along the first transverse direction, wherein at least one streamlined body includes:
• two lateral surfaces that are arranged substantially parallel to the main-flow direction with a central plane there between, wherein the two lateral surfaces are joined to one another at upstream sides of the two lateral surfaces to form a leading edge of the at least one streamlined body and are joined at downstream sides of the two lateral surfaces to form a trailing edge of the at least one streamlined body;
• the at least one streamlined body extending perpendicularly to the main-flow direction and along the first transverse direction, and having a cross-section perpendicular to the first transverse direction that is shaped as a streamlined profile;
• a mixing structure with at least two fuel nozzles located at the trailing edge, wherein the mixing structure is a plurality of lobes located at the trailing edge of the at least one streamlined body, wherein each lobe extends substantially perpendicular to a central plane in a second transverse direction or a third transverse direction, wherein the second and third transverse directions run oppositely to one another, and wherein lobe side walls include straight sections such that a lobed trailing edge is provided which includes the straight sections, wherein the at least two fuel nozzles are tilted to inject at least one fuel and/or a carrier gas at an inclination angle with respect to the main-flow direction ranging from 0° to 60°, the at least two fuel nozzles comprising at least one first fuel nozzle arranged closest to the limiting wall at the trailing edge of the at least one streamlined body, wherein the at least one first fuel nozzle is tilted so as to inject a fuel jet away from the limiting wall,
• the method comprising:
• determining a number of the at least one fuel nozzle, through which fuel is injected, as a function of a total injected fuel flow.