Patent ID: 6871503
Filing Date: 2005-03-29
Classification: F23R

Abstract:
1. A gas turbine combustor comprising a combustion chamber, diffusive combustion nozzles which inject fuel into air in said combustion chamber to form a diffusive combustion flame, an annular premixing flow passage formed by outer and inner walls in said combustion chamber and premixing nozzles disposed in said premixing flow passage for injecting fuel therein to mix with air to form a premixed gas, which flows out into said combustion chamber to form a premixing flame, characterized in that a plurality of said premixing nozzles are mounted in spaced relationship in said premixing flow passage; a plurality of spaced openings are formed in said outer wall through which air flows to mix with fuel from said premixing nozzles and form a swirling flow with respect to each of said premixing nozzles along an axial direction of said premixing flow passage; and said openings are disposed in a circumferential direction whereby one opening is provided for each two adjacent nozzles at an intermediate position between the two adjacent nozzles in the circumferential direction.