Patent ID: 9163839
Filing Date: 2015-10-20
Classification: F23R

Abstract:
1. A micromixer for a combustor having a combustion chamber, the micromixer comprising: an end plate; a plurality of base nozzle structures extending from the end plate, wherein each of the base nozzle structures comprise coaxial tubes comprising an inner tube and an outer tube; a plurality of mixing tubes segmented into bundles of mixing tubes, wherein each bundle of mixing tubes is at least partially supported by one of the plurality of base nozzle structures, wherein the plurality of mixing tubes comprise a first end and a second end, and wherein the first end of the plurality of mixing tubes is spaced apart from the end plate to form an air passage about the plurality of base nozzle structures; a plurality of fuel plenums, wherein each bundle of mixing tubes comprises one of the plurality of fuel plenums disposed around the bundle of mixing tubes downstream of the air passage and between the first end and the second end of the plurality of mixing tubes, wherein the outer tube of the coaxial tubes is in fluid communication with the respective fuel plenum, and wherein the inner tube of the coaxial tubes is in fluid communication with the combustion chamber; a removable end cap assembly disposed about the plurality of mixing tubes; and wherein the plurality of base nozzle structures extend from the endplate in a circumferential array such that the air passage, the plurality of fuel plenums, and the segmented bundles of mixing tubes are positioned adjacent to one another to form a single, circular micromixer that exits an air/fuel mixture into the combustion chamber.