Patent ID: 7673454
Filing Date: 2010-03-09
Classification: F02C

Abstract:
1. A combustor of a gas turbine, the combustor comprising an inner tube and a transition pipe connected together, wherein an internal swirler comprising a cylindrical internal swirler ring disposed concentrically with respect to a central axis of the inner tube, and a plurality of internal swirler vanes provided on an outer peripheral surface of the internal swirler ring, and an external swirler comprising a cylindrical internal swirler ring disposed on an outer peripheral side of the internal swirler vanes and concentrically with respect to the internal swirler ring, and a plurality of external swirler vanes provided on an outer peripheral surface of the external swirler ring are arranged inside the inner tube to form internal divisional fluid passages defined by the internal swirler ring, the external swirler ring, and the plurality of the internal swirler vanes, and external divisional fluid passages defined by the external swirler ring, the inner tube, and the plurality of the external swirler vanes, the internal divisional fluid passages are divided into a first group consisting of a plurality of the divisional fluid passages arranged sequentially in a circumferential direction, and a second group consisting of a plurality of the divisional fluid passages arranged sequentially in the circumferential direction, a fuel injection hole for injecting fuel into the internal divisional fluid passages is formed in a vane surface of each of the internal swirler vanes, and a fuel injection hole for injecting fuel into the external divisional fluid passages is formed in a vane surface of each of the external swirler vanes, and the combustor further comprising first fuel supply means for supplying fuel to fuel injection holes facing the internal divisional fluid passages of the first group among the fuel injection holes formed in the internal swirler vanes, second fuel supply means for supplying fuel to fuel injection holes facing the internal divisional fluid passages of the second group among the fuel injection holes formed in the internal swirler vanes, and third fuel supply means for supplying fuel to fuel injection holes formed in the external swirler vanes.