Patent ID: 8181464

Claim:
A swirler passage for mixing fuel and compressor air, comprising: a first swirler vane having a first side wall and a second swirler vane having a second side wall, wherein the first and second side walls are separated by a pathway; a support surface for supporting the first and second side walls; a first conduit and second conduit arranged inside at least one of the plurality of side walls, the first conduit forming a fuel gas conduit and the second conduit forming an air conduit, the fuel gas conduit connected to a gas fuel supply and the air conduit connected to an air supply; a tube connected to the fuel gas conduit and entirely traversing the air conduit; a fluid passage connected to the air conduit and surrounding the tube; a first fuel outlet opening of the tube arranged on the first side wall; a first air outlet opening of the fluid passage arranged on the first side wall and surrounding the first fuel outlet opening; a second fuel outlet opening located on the support surface between the first and second side walls wherein the second fuel outlet opening is coupled to the gas fuel supply; and a second air outlet opening located on the support surface between the first and second side walls and surrounding the second fuel outlet opening wherein the second air outlet opening is coupled to the air supply and wherein fuel from the first and second fuel outlet openings and air from the first and second air outlet openings is introduced into the pathway between the first and second swirler vanes.