An injector nozzle used with an internal combustion engine for guiding and shaping a fluid flow, comprising: a nozzle body comprising an inlet for admitting the fluid flow and an outlet; and a fluid flow guide in fluid communication with the outlet of the nozzle body, wherein the fluid flow guide comprises a plurality of fluid passageways (1102-1110) for creating a plurality of stream jets, wherein each passageway has an orifice (1121-1130) through which a respective stream jet is discharged from a respective passageway, wherein the plurality of fluid passageways comprises: a first group of fluid passageways and a first group of orifices (1121-1125) corresponding to the first group of fluid passageways, respectively; and a second group of fluid passageways and a second group of orifices (1126-1130) corresponding to the second group of fluid passageways, respectively; wherein imaginary extensions of the first group of passageways converge to create at least one first focal point , such that the plurality of stream jets passing through the first group of passageways impinge on each other to form a first spray plume, wherein imaginary extensions of the second group of passageways converge to create at least one second focal point , such that the plurality of stream jets passing through the second group of passageways impinge on each other to form a second spray plume, characterized in that the first group of orifices are arranged on a first imaginary circle on an exterior surface of the fluid flow guide, wherein the first group of orifices are radially asymmetrically distributed on the first imaginary circle with respect to the central axis of the first imaginary circle, and the second group of orifices are arranged on a second imaginary circle on the exterior surface of the fluid flow guide, wherein the second group of orifices are radially asymmetrically distributed on the second imaginary circle with respect to the central axis of the second imaginary circle. a nozzle body comprising an inlet for admitting the fluid flow and an outlet; and a fluid flow guide in fluid communication with the outlet of the nozzle body, wherein the fluid flow guide comprises a plurality of fluid passageways (1102-1110) for creating a plurality of stream jets, wherein each passageway has an orifice (1121-1130) through which a respective stream jet is discharged from a respective passageway, wherein the plurality of fluid passageways comprises: a first group of fluid passageways and a first group of orifices (1121-1125) corresponding to the first group of fluid passageways, respectively; and a second group of fluid passageways and a second group of orifices (1126-1130) corresponding to the second group of fluid passageways, respectively; wherein imaginary extensions of the first group of passageways converge to create at least one first focal point , such that the plurality of stream jets passing through the first group of passageways impinge on each other to form a first spray plume, wherein imaginary extensions of the second group of passageways converge to create at least one second focal point , such that the plurality of stream jets passing through the second group of passageways impinge on each other to form a second spray plume, the first group of orifices are arranged on a first imaginary circle on an exterior surface of the fluid flow guide, wherein the first group of orifices are radially asymmetrically distributed on the first imaginary circle with respect to the central axis of the first imaginary circle, and the second group of orifices are arranged on a second imaginary circle on the exterior surface of the fluid flow guide, wherein the second group of orifices are radially asymmetrically distributed on the second imaginary circle with respect to the central axis of the second imaginary circle. <EOS>