Patent ID: 6945051
Filing Date: 2005-09-20
Classification: F23D,F23R

Abstract:
1. A diffusion flame combustor for a gas turbine comprising a flame tube that delimits a combustion chamber, said flame tube having a fuel injector unit mounted at one end with its other end connected to a duct that conveys the combustion gases to the turbine, said flame tube being coaxially mounted inside a generally tubular container that communicates with the discharge casing of an air compressor and, together with said tube, defines a space for said combustion air, said injector unit comprising an injector head facing generally into said combustion chamber and being provided with at least one fuel gas injection nozzle, wherein the fuel gas injection nozzle comprises an air-gas premixing duct into which the fuel gas is introduced, said duct having an inlet section that communicates with said air space and being provided with a radial-fin air swirler arranged upstream of the point at which the fuel gas enters said premixing duct, and a plurality of passages being provided along said premixing duct for introduction of the fuel gas, said passages being arranged into two axially concentric rows in order to subdivide introduction of the fuel gas into the combustion air into two successive phases.