Turbine burner

A turbine burner, comprising:

• a secondary feed unit for supplying a secondary fuel or air and for discharging the secondary fuel or air from an orifice into a combustion zone;
• and
• a primary feed unit comprising a primary mixing tube and a fuel nozzle having a fuel nozzle outlet pointing into the combustion zone for supplying a primary fuel,
• wherein the fuel nozzle and the primary mixing tube are arranged concentrically around the secondary feed unit,
• wherein the primary mixing tube and the fuel nozzle have a fluid flow connection,
• wherein the fuel nozzle has an annular wall spaced radially apart from the secondary feed unit in an axial direction to form a gap height by the annular wall and the secondary feed unit,
• wherein the annular wall has an internal wall directed toward the secondary feed unit,
• wherein a fluid channel is between the secondary feed unit and the annular wall,
• wherein the fluid channel comprises blades each having a blade leading edge on an upstream side,
• wherein the fuel nozzle has a fuel nozzle inlet,
• wherein the each blade has an axial distance to the fuel nozzle inlet and a ratio of the axial distance to the gap height is greater than 1 and less than 4, and
• wherein the fuel nozzle inlet has a greater gap height to form a wider inlet.