Method for mixing a dilution air in a sequential combustion system of a gas turbine

摘要

B 12/068-0 SF Abstract The invention relates a method for mixing a dilution air with a hot main flow in a sequen tial combustion system of a gas turbine (100), wherein the gas turbine essentially com prises at least one compressor, a first combustor which is connected downstream to the compressor The hot gases of the first combustor are admitted to at least one intermedi ate turbine or directly or indirectly to at least one second combustor, wherein the hot gases of the second combustor are admitted to a further turbine or directly or indirectly to an energy recovery. The method comprising a coaxial injection of first combustor liner cooling air (104) with second combustor liner cooling air (105) having a sufficient excess pressure margin with respect to the second combustor liner cooling air Fig. 3 B 12 /068-0 It- co > Wc > w > COD, oc CDq