Patent ID: 8919125

Claim:
A combustor casing fuel injector in a combustor of a combustion turbine engine, the combustor including a combustor casing that encloses internal structure of the combustor, wherein the combustor casing fuel injector includes a fuel manifold adjacent to an outer surface of the combustor casing, the combustor casing fuel injector comprising: fuel injectors; wherein the fuel injectors extend through the combustor casing from a position within the fuel manifold to a predetermined fuel injection location; wherein the fuel injectors include a protruding injector inlet within the fuel manifold; wherein the fuel manifold comprises an annular fuel manifold that wraps around the combustor casing and the fuel injectors are located at predetermined angular positions about the combustor casing, the fuel manifold comprising an inner radial surface opposed relative an outer radial surface; wherein the protruding injector inlet comprises a protrusion, which juts from the inner radial surface of the fuel manifold, and a plurality of apertures; and wherein a first minimum aperture clearance between the apertures and the inner radial surface of the fuel manifold and a second minimum aperture clearance between the apertures and the outer radial surface of the fuel manifold are configured such that each varies in relation to the expected effect of gravity on sinking debris given the predetermined angular position of each of the fuel injectors.