Patent ID: 9551491
Date: 2017-01-24
CPC Classifications: F02C,F23R,Y02E

Claim:
1. A method for mixing a dilution air with a hot main flow in a sequential combustion system of a gas turbine, wherein the gas turbine comprises at least one compressor, a first combustor which is connected downstream to the compressor and at least one second combustor, hot gases of the first combustor are admitted to at least one intermediate turbine or to the at least one second combustor, wherein hot gases of the second combustor are admitted to a further turbine or directly or indirectly to an energy recovery device; the method comprising: coaxial injecting radially said first combustor liner cooling air with a radial-coaxial said second combustor liner cooling air, the first combustor liner cooling air having an excess pressure margin with respect to the second combustor liner cooling air.