Fuel injection assemblies in combustion turbine engines

摘要

An assembly for use in a fuel injection system within a combustor of a combustion turbine engine is described. The assembly may include: a first port (42) formed through an outer radial wall (26) of the combustor and a second port (43) formed through an inner radial wall (24). A plenum (44) may be formed about the first port. A tube (45) may be formed that has a first end positioned within the first port and a second end positioned within the second port. At the first end, the tube may be sized smaller than the first port such that two passages are defined therethrough: a first passage (48) defined about an exterior of the tube; and a second passage (49) defined through an interior of the tube.