Patent ID: 9709277
Date: 2017-07-18
CPC Classifications: F23R

Claim:
1. A micro-mixer fuel plenum for mixing a flow of fuel and a flow of air in a combustor, comprising: an outer barrel; and a plurality of mixing tubes positioned within the outer barrel, wherein the plurality of mixing tubes comprises an outer surface, an inner surface, a first end, and a second end; the plurality of mixing tubes comprising a plurality of ribs and a plurality of dimples having curved profiles; wherein the plurality of dimples are formed in between the outer surface and the inner surface, the plurality of dimples positioned in an offset formation across the outer surface, such that a first set of dimples on a first side of the outer surface are in an offset position with respect to a second set of dimples on a second side of the outer surface, and wherein none of the dimples on the first side are aligned with dimples on the second side, wherein the second side is opposite the first side; and wherein the plurality of ribs are positioned on the outer surface of the plurality of mixing tubes and extend along a central axis of the plurality of mixing tubes.