Fuel injector device

A fuel injector device (1) comprises a body, said body comprising a leading edge (11) and a trailing edge (12) and defining a streamwise direction (3) from the leading edge to the trailing edge. The fuel injector device body further comprises a first surface (101) and a second surface (102) opposite the first surface, each of said surfaces extending between and comprising the leading edge (11) and the trailing edge (12), and said surfaces conjoining each other at the leading edge and the trailing edge. The trailing edge (12), when seen in the streamwise direction, undulates along a trailing edge mean line (13) and, along its extent, deviates in opposite directions from said mean line and further comprises at least one inflection point (14) along its extent. The fuel injector device further comprises at least one first internal fuel supply means and at least one first fuel discharge duct fluidly connecting the at least one first internal fuel supply means with a first fuel discharge means (15) opening out to the exterior of the injector device, wherein at least one first fuel discharge duct terminates at a first fuel discharge means arranged at the trailing edge. At least one first fuel discharge means (15) is arranged at the trailing edge (12) between two trailing edge inflection points (14).