LOW NOX BURNER WITH COMBUSTION FLAME STABILIZED DYNAMICALLY

PROBLEM TO BE SOLVED: To enhance combustion stability by forming the combustion chamber of a combustor having a doom coupled with a plurality of premixers at one end thereof, providing each premixer with an air swirler in a duct and further providing a plurality of fuel injectors for jetting fuel into the swirling air. SOLUTION: The burner 14 for an industry gas turbine has a plurality of combustion chambers 26 contiguous in the circumferential direction and each combustion chamber 26 defined by a tubular combustion liner 26a has a substantially flat doom 26b, at the upstream end thereof, coupled with a plurality of premixer 28. Each premixer 28 comprises a tubular duct 30 which receives compressed air 20 from a compressor 12 at an inlet 30a provided at the upstream end and a following swirler 32 imparts a swirl to the compressed air 20. Fuel 22, e.g. natural gas, from a fuel injector is then jetted from a large number of orifices 40 into swirling air thus produced and burnt in the combustion chamber 26 to produce a combustion flame 24.