Gas turbine combustor and method of operating the same.

摘要

Disclosed is a gas turbine combustor comprising a combustion sleeve (7), a combustion sub-chamber (1) disposed in an upstream side of the combustion sleeve and having an air and fuel supply system, and a combustion main chamber (2) disposed in a downstream side of the sub-chamber (1) and having an air and fuel supply system, and formed in such a manner that the start-up of the gas turbine is effected by the hot combustion gas generated in the sub-chamber, characterized in that there is provided in the combustion sub-chamber with an inner sleeve (10) protruding from a side wall of the sub-chamber such that its tip is located in the vicinity of a downstream end of the sub-chamber (1), and that there is provided in a tip of said inner sleeve (10) with a fuel nozzle (12) for increasing the fuel-to-air ratio during an initiating period of an increase in the gas turbine rotation speed. A method of operating this gas turbine combustor is also disclosed.