GAS TURBINE ENGINE COMBUSTION CHAMBER

PROBLEM TO BE SOLVED: To control a temperature at an intake port for a catalyst combustion zone so as to be within a predetermined temperature range. SOLUTION: A gas turbine engine combustion chamber 28 is provided with a primary combustion zone 36 and a secondary combustion zone 40, located at the downstream side of the primary combustion zone 36. A catalyst combustion zone 44 is arranged at the downstream side of the secondary combustion zone and a uniform combustion zone 100 is arranged at the downstream side of the catalyst combustion zone. A pilot injector 62 sends fuel into the primary combustion chamber. At least one set of preliminary mixing ducts 54, 56 are provided with a plurality of primary fuel injectors 58, 60 to supply first mixture into the primary combustion zone. The secondary premixture duct 64 is provided with a plurality of secondary fuel injectors 82 to supply secondary mixture into the secondary combustion zone. A plurality of temperature sensors are arranged at the intake port for the catalyst combustion zone and a processor controls valves 106, 108, 110 while the valves regulate the supply of fuel so as to guarantee that a temperature at an intake port for the catalyst combustion zone is within a predetermined temperature range.