| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact combustor achieved in NOx reduction. SOLUTION: The combustor includes a pilot nozzle 21 installed a shaft core of the combustor 1 to carry out diffusion combustion, a plurality of main nozzles 22 installed in an outer circumference side of the pilot nozzle 21 at intervals in a circumference direction and carrying out premix combustion, one inner tube 2a surrounding the pilot nozzle 21 and each main nozzle 22, and an outer tube coaxially surrounding the inner tube 2a from the outside and formed with a compressed air passage 6 between its inner circumference face and an outer circumference face of the inner tube. Compressed air flowing in the compressed air passage 6 is introduced in the pilot nozzle 21 with a flow direction substantially reversed in an end of the inner tube 2a. A flow control means for increasing a flow rate of a combustor 1 inner circumference side of the passage more than a flow rate of an outer circumference side is provided in the compressed air passage 6. A straightening vane 51 formed with holes 55, 56 can be given as the flow control means. COPYRIGHT: (C)2009,JPO&INPIT
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