Patent ID: 8424311

Claim:
A fuel/air mixing disk for use in a fuel/air mixing combustor assembly comprising: a plurality of adjacent, pie-shaped sectors, each sector having a first face, a second face, and an annular wall coupling the first and second faces together and separating the first and second faces to provide at least one fuel plenum disposed between the first and second faces and bounded by the annular wall and adapted to be in fluid communication with a fuel flow passage extending from an end cover of the combustor assembly transverse to the first face and intersecting the first face at a central position of at least one sector of the disk away from the annular wall; and a plurality of fuel/air mixing tubes extending through each sector between the first face and the second face, each mixing tube including an outer tube wall extending axially along a tube axis between an inlet end and an exit end and in fluid communication with the at least one fuel plenum, each mixing tube being attached at its respective inlet end to the first face and at its respective outlet end to the second face, at least a portion of the plurality of fuel/air mixing tubes further including at least one fuel injection hole having a fuel injection hole diameter extending through said outer tube wall, said at least one fuel injection hole having an injection angle relative to said tube axis, said injection angle being in the range of 20 to 90 degrees, and wherein a recession distance between said fuel injection hole and said exit end along said tube axis is about 5 to 100 times greater than said fuel injection hole diameter.