METHOD FOR MIXING DILUTION AIR IN SEQUENTIAL COMBUSTION SYSTEM OF GAS TURBINE

摘要

PROBLEM TO BE SOLVED: To provide a method for mixing a dilution air with a hot main flow in a sequential combustion system of a gas turbine (100).SOLUTION: The gas turbine essentially comprises: at least one compressor; and a first combustor which is connected downstream from the compressor. The hot gases of the first combustor are supplied to at least one intermediate turbine or directly or indirectly to at least one second combustor. The hot gases of the second combustor are supplied to a further turbine or directly or indirectly to an energy recovery. First combustor liner (104) cooling air is injected coaxially with second combustor liner (105) cooling air, accompanied with a sufficient excess pressure margin with respect to the second combustor liner cooling air.