| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustor capable of ensuring ignition and flame propagation at a low fuel concentration whichever fuel is used, gas fuel or liquid fuel.SOLUTION: A plurality of combustors are disposed annularly on an outer circumferential portion of a casing of a turbine, and each of the combustors comprises: a combustion chamber burning fuel and air to generate combustion gas; a diffuse combustion burner 14 provided upstream of the combustion chamber; a plurality of premixed combustion burners provided around the diffuse combustion burner 14; and a plurality of flame propagation pipes 20 communicating the combustion chamber of the own combustor with the combustion chambers of the combustors adjacent to the own combustor on circumferentially both sides of the casing, respectively, a flame propagation pipe 20b connected to the combustor adjacent to the own combustor on one circumferential side of the casing being disposed so that a central axis of the flame propagation pipe 20b passes above a premixed combustion burner 15w in a view from the own combustor, and a flame propagation pipe 20c connected to the combustor adjacent to the own combustor on the other circumferential side being disposed so that a central axis of the flame propagation pipe 20c passes between two adjacent premixed combustion burners 15y and 15z in a view from the own combustor.SELECTED DRAWING: Figure 1 |
