Combustor and method for supplying fuel to a combustor

摘要

A combustor includes an end cap having an upstream surface axially separated from a downstream surface and a cap shield circumferentially surrounding the upstream and downstream surfaces. A first circuit of tubes extends from the upstream surface through the downstream surface. A first fuel plenum is in fluid communication with the first circuit of tubes. A second circuit of tubes extends from the upstream surface through the downstream surface. A second fuel plenum downstream from the first fuel plenum is in fluid communication with the second circuit of tubes. A method for supplying fuel to a combustor includes flowing a working fluid through tubes, flowing fuel or diluent from a first fuel plenum through a first circuit of tubes, and flowing fuel or diluent from a second fuel plenum through a second circuit of tubes, wherein the second fuel plenum is downstream from the first fuel plenum.

主权项

1. A combustor, comprising:
an end cap that extends radially and axially within a casing of the combustor, wherein the end cap comprises an upstream surface axially separated from a downstream surface and a cap shield circumferentially surrounding the upstream surface and the downstream surface; a first fuel plenum defined within the cap shield between the upstream surface and a first barrier; a first baffle disposed within the first fuel plenum upstream from the first barrier; a first conduit extending through the upstream surface into the first fuel plenum, wherein the first conduit is oriented to direct a flow of fuel into the first fuel plenum against the first baffle, wherein the flow of fuel is substantially perpendicular to the first baffle: a first circuit of tubes extending through the upstream surface and the downstream surface within the cap shield, wherein the first circuit of tubes are in fluid communication with the first fuel plenum; a second fuel plenum defined within the cap shield between the first barrier and the downstream surface; a second baffle disposed within the second fuel plenum between the first barrier and the downstream surface; a second conduit extending through the upstream surface, through the first fuel plenum, through the first barrier and into the second fuel plenum, wherein the second conduit is oriented to direct a flow of fuel into the second fuel plenum against the second baffle, wherein the flow of fuel is substantially perpendicular to the second baffle; and a second circuit of tubes extending through the upstream surface and the downstream surface within the cap shield, wherein the second circuit of tubes are in fluid communication with the second fuel plenum.