Patent ID: 8438852

Claim:
A combustor section, comprising: one or more annular quaternary fuel manifolds mounted within a section of an annular passage defined between a casing and a cap assembly of a combustor through which air and/or a fuel/air mixture flows upstream from a fuel nozzle support, the annular passage being defined such that the air and/or the fuel/air mixture flows through the annular passage in a reverse direction radially outwardly of the fuel nozzle support and in a forward direction radially aligned with the fuel nozzle support, the section of the annular passage being provided where the air and/or the fuel/air mixture flows in the reverse direction, each manifold including a body to accommodate quaternary fuel therein, the body defining injection holes through which the quaternary fuel is injected into the section of the annular passage at an axial location upstream from the fuel nozzle support, the fuel nozzle support being one of a plurality of fuel nozzle supports and the combustor section further comprising an annular baffle extending axially from the cap assembly along a local flow direction to surround the plurality of fuel nozzle supports, the section of the annular passage being radially interposed between the casing and the annular baffle and interposed between an axial location of the fuel nozzle support and an axial location at which the air and/or the fuel/air mixture changes from flowing in the reverse direction to flowing in the forward direction.