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A combustor having an annular first stage, a generally cylindrically-shaped second stage, and an annular conduit communicably connecting the first and second stages. The conduit has a relatively small annular height and a large number of quench holes in the walls thereof such that quench air injecte

A combustor having an annular first stage, a generally cylindrically-shaped second stage, and an annular conduit communicably connecting the first and second stages. The conduit has a relatively small annular height and a large number of quench holes in the walls thereof such that quench air injected into the conduit through the quench holes will mix rapidly with, or quench, the combustion gases flowing through the conduit. The rapid quenching reduces the amount of NOx produced in the combustor.

대표청구항 ▼

In a gas turbine engine, a method of burning fuel in a combustor having a single fuel injection stage and having upstream and downstream portions, comprising the steps of: (a) generating, in an upstream annular first stage of the combustor, a burning fuel-air mixture which has a fuel-air equivalence

In a gas turbine engine, a method of burning fuel in a combustor having a single fuel injection stage and having upstream and downstream portions, comprising the steps of: (a) generating, in an upstream annular first stage of the combustor, a burning fuel-air mixture which has a fuel-air equivalence ratio greater than unity and which is flowing downstream; (b) channeling the burning fuel-air mixture into an annular conduit located downstream of the first stage, the annular conduit (i) being defined by radially inner and radially outer walls and (ii) having an annular height less than the annular height of the annular first stage; (c) injecting substantially all quench air to be added to the fuel into the annular conduit through a plurality of holes contained in the radially inner and outer walls of (b)(i) (i) for reducing the fuel-air equivalence ratio below unity, (ii) for causing the greatest rate of NOx production to occur within the annular conduit; and (d) venting the burning fuel-air mixture mixed with quench air from the annular conduit of (c) to a second stage for further combustion.