GAS TURBINE COMBUSTOR, AND METHOD FOR MIXING FUEL AND AIR IN GAS TURBINE COMBUSTOR

摘要

PROBLEM TO BE SOLVED: To reduce NOx for achieving combustion even in a thin fuel concentration by improving the mixture of fuel and air in a gas turbine combustor. ;SOLUTION: In a swirl channel (15), a swirler (14) is arranged in a swirl pipe (15a), and a main nozzle (12) that is supported by the swirler is arranged at a center. The main nozzle is formed in a double pipe consisting of an outer pipe (12a) and an inner pipe (12b), and fuel is jetted into air that is supplied from the area between the outer and inner pipes via the inner pipe. A fuel/air mixture that is formed by mixing both of them is jetted out of a jetting hole (12hm). Therefore, the fuel is mixed with air in advance, which is further mixed with air, thus discharging the gas that has been mixed in advance and has a more uniform fuel concentration from the swirl channel.;COPYRIGHT: (C)2001,JPO