Patent ID: 8887506

Claim:
A fuel injector, comprising: a secondary injector body located downstream of a primary fuel injector, the secondary injector body having a plurality of manifolds, an inlet, and an outlet, the plurality of manifolds configured for receiving fuel and the inlet configured for receiving air; a mixing circuit positioned within the injector body, the mixing circuit configured for receiving fuel from a first manifold of the plurality of manifolds and air from the inlet to create an air-fuel mixture that exits the outlet; and at least one injector positioned radially outwardly from the mixing circuit, the at least one injector receiving fuel from a second manifold of the plurality of manifolds and injecting fuel to the outlet, wherein the air-fuel mixture and the fuel routed to and through the at least one injector are fluidly isolated from each other along an entire length of the mixing circuit prior to injection into a secondary combustion section of a gas turbine engine.