Tubular combustion chamber having a flame tube end region and gas turbine

Abstract

The invention relates to a tubular combustion chamber (22) for a gas turbine (1) having a combustion chamber head end (24), on which at least one first burner arrangement (11, 26) is arranged, a substantially cylindrical flame tube (28), which encloses a first combustion zone (30) and comprises a cylindrical flame tube end region (32, 46, 52, 72), and a transition duct (36), the cylindrical flame tube end region (28) projecting into the transition duct and the transition duct fluid-connecting the flame tube to a combustion chamber outlet (34), which can be arranged on a turbine inlet region, wherein the cylindrical flame tube end region comprises a number of cooling ducts (44, 48, 54, 66, 70), which run substantially parallel to the lateral face of the flame tube end region in the interior of the flame tube end region. The tubular combustion chamber according to the invention allows for the reduction of pollutant emissions from the gas turbine. To this end, the cooling ducts are configured and / or arranged such that on average less cooling air flows through regions (50) under low thermal load than through regions (42) under high thermal load of the flame tube end region (32, 46, 52, 72).

Description

technical field [0001] The invention relates to a tubular combustor of a gas turbine and a shell part of the tubular combustor. The housing part is formed as a tubular combustion chamber end region. Background technique [0002] In the simplest case, a gas turbine comprises a compressor for supplying compressed air, at least one combustion chamber and a turbine. [0003] The combustion chamber includes at least one burner for introducing fuel into the interior of the combustion chamber. The fuel introduced into the combustion chamber is converted into hot working gas in at least one combustion zone of the combustion chamber by reacting with the combustion air supplied by the compressor. [0004] With the help of the hot working gas, the turbine is set in rotation so that the shaft is driven. A portion of the rotational energy transferred to the shaft is used to drive the compressor. The remainder of the rotational energy can be used to drive construction machinery, espec...

AI Technical Summary

Problems solved by technology

However, this leads to a disadvantageous increase in NOx pollutant emissions, because the cooling air cannot be used as combustion air and leads to a disadvantageous increase in CO, because the cold air coming out of the cooling air channel causes cold jets in the combustion chamber, so that Slow down the CO burnup reaction in the region (Ausbrandreaktion)

Images