Patent ID: 7571612

Claim:
A fuel supply method for a gas turbine combustor for mixing combustion air introduced from a compressor and fuel in a pre-mixture chamber, the method comprising the steps of: jetting first fuel into said pre-mixture chamber from an upstream side in an axial direction of said pre-mixture chamber; and jetting second fuel into a plurality of air inlet holes bored through a pre-mixture chamber wall having a hollow conical shape forming said pre-mixture chamber from positions disposed outside and around an outer circumferential side of said pre-mixture chamber wall, the jetting of second fuel being in an opposing relation respectively to said plurality of air inlet holes thereby to jet out a coaxial jet stream of said second fuel and the combustion air into said pre-mixture chamber toward a wall surface of said pre-mixture chamber wall while deflecting the coaxial jet stream at least toward the circumferential direction of said pre-mixture chamber.