| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustor improved in flow rate balance in split air flows.SOLUTION: A combustor 1 in which air flow 10 supplied from the upstream side is split in a damping chamber 21, and the split air flows 10a, 10b are supplied to a combustion chamber 18 from an outer peripheral-side flow channel 16 and an inner peripheral-side flow channel 17, respectively, includes: a pre-diffuser 6 composed of an inner peripheral nozzle plate 6a and an outer peripheral nozzle plate 6b, and supplying the air flow into the damping chamber; suction holes 11 respectively formed on the inner peripheral nozzle plate and the outer peripheral nozzle plate of a speed reducing portion 8 projecting into the damping chamber of the pre-diffuser; a cowl 15 disposed in the damping chamber in opposition to the pre-diffuser and having a convex curved surface; and a plurality of burner nozzles arranged at equal angular pitches and injecting a fuel into the combustion chamber. A part of the air flow colliding with the cowl is separated so that standing vortex is formed in the damping chamber, and a part of the standing vortex is sucked into the speed reducing portion through the suction holes. |
