GAS TURBINE DUCT STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a gas duct structure minimizing the leakage of operating gas from a connection part between each combustion chamber and an annular passage in the gas duct structure for supplying combustion gas from a plurality of combustion chambers arranged around a turbine, to the annular passage including a turbine blade structure. SOLUTION: Each combustion chamber has a transition duct section comprising a short length part of the cylindrical combustion chamber (an inner chamber wall 9 and an outer sleeve 11) and a section of an annular duct (an inner annular duct wall 25 and an outer annular duct wall) integrally extending from the short length part. Four transition duct sections of four combustion chambers are combined to make up a complet annulus that is clamped to an annular turbine blade structure, that is, a nozzle guide vane 85.