Patent ID: 8365531

Claim:
A fuel injector head for a gas turbine engine comprising: a pilot injector having a central axis, the pilot injector being arranged to direct fuel and air to a pilot combustion zone; a main injector located radially outwardly of the pilot injector and being arranged to direct fuel and air to a main combustion zone: a splitter separating the pilot injector from the main injector the splitter having a radially inner surface and a radially outer surface and an end face connecting the inner surface with the outer surface, wherein the end face has a plurality of directing apertures for directing air directly into a combustor chamber, the plurality of directing apertures being supplied with air from a passage within the splitter, the passage has a plurality of metering apertures to meter the flow of air in the passage and a momentum at the plurality of directing apertures, the momentum being sufficient to delay mixing of the pilot and main combustion zones, the radially inner surface of the splitter defines a first portion which tapers radially inwardly to a throat and a second portion which tapers radially outwardly from the throat to the end face, and an angle of the radially outwards taper is such that a flow of air in use over the radially inner surface remains attached over a length of the surface.