further exemplary embodiments of a fuel nozzle 14 fig3 9 12 and 15 each show the fuel nozzle 14 in side view arrows indicating an inflow direction 28 30 32 for each of the gases in this case the first fuel flows in radially in the inflow direction 28 and the second fuel and the air flow in axially in the inflow directions 30 32 as a result of the axial inflow in the premixing chamber 6 in particular the general direction of flow s is established which the first fuel also substantially adopts at a sufficient distance from the radial outlet orifices 18 fig4 10 13 and 16 each show the corresponding fuel lance 14 in front view and fig5 11 14 and 17 each show the corresponding fuel lance 14 in perspective view the embodiment of the fuel nozzle 10 shown in fig3 to 5 comprises a number of forwards oriented tetrahedral vortex generators 22 which are mounted on the fuel lance 14 downstream of the axial outlet orifice 20 and upstream of the radial outlet orifices 18 here the vortex generators 22 each have a height h which is here selected such that the vortex generator 22 extends further in the radial direction than the outer pipe 16 this is shown particularly clearly in fig4 this makes it possible in particular for air to.