| 摘要 |
PROBLEM TO BE SOLVED: To reduce Nox by providing a burner for supplying a premixed gas with air at a fuel combustion chamber and forming a plurality of ejection openings of the premix burner in the inner circumferential side face of the combustion chamber along the axial direction thereof thereby making lean the premixed gas through effective use of cooling air. SOLUTION: Compressed air 50 from a compressor 10 passes between the outer tube 2 of a gas turbine combustor and a combustor liner 3 and then a part thereof flows into a premixer 12 as premix combustion air 49 while the remainder flows from a combustion air hole 14 and a cooling air hole 17 into a combustion chamber 1. Diffused combustion fuel 16 is ejected from a diffusion fuel nozzle 13 into the combustion chamber 1 to form a diffused flame 4 and premixing fuel 21 is ejected from a fuel nozzle 8 into an annular premixer 12 where it is mixed with air to produce premixed gas 22. The premixed gas 22 flows from a combustor liner 3 having a louver-like ejection opening into the combustion chamber 1 where it is fired by high temperature gas generated through diffused combustion to form a premixed flame 5 along the wall face of the liner.
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