Method of using a combustion chamber for a gas turbine
AssigneeALSTOM Technology Ltd
InventorElisabetta Carrea
Life of this patent
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Abstract
A combustion chamber 10 for a gas turbine that operates in a highly diluted mode of combustion has a substantially toroidal plenum 30. At least one combustion fluid injector is located at the periphery of the plenum. The shape of the plenum and the disposition of the combustion fuel injectors are such that a vortex flow 2 is established in the combustion chamber in use. Gasses are entrained in the vortex which provides high enough levels of flue gas re-circulation to allow for the onset of highly diluted combustion.
Claims25
A method of using a combustion chamber for a gas turbine, the method comprising:
- providing a substantially toroidal plenum extending around a rotor axis of the gas turbine, providing the plenum with a substantially tangential outlet extending around an inner peripheral region of the plenum, and using the tangential outlet to direct gases towards the turbine in a direction that is parallel to the rotor axis of the turbine;
- using at least one combustion fluid injector disposed in a peripheral region of the plenum to inject fluid into the plenum to establish a vortex flow in a central region of the plenum that extends around the rotor axis of the gas turbine in a circular path, and using the at least one combustion fluid injector to entrain sufficient gasses in the vortex to establish a high enough flue gas re-circulation rate to enable the generation of a highly diluted combustion mode in the plenum during combustion;
- using at least one oxidant injector and at least one fuel injector;
- and
- operating the combustion chamber with separate oxidant and fuel injection.
A method of using a combustion chamber for a gas turbine, the method comprising:
- providing a substantially toroidal plenum extending around a rotor axis of the gas turbine, providing the plenum with a substantially tangential outlet extending around an inner peripheral region of the plenum, and using the tangential outlet to direct gases towards the turbine in a direction that is parallel to the rotor axis of the turbine;
- using at least one combustion fluid injector disposed in a peripheral region of the plenum to inject fluid into the plenum to establish a vortex flow in a central region of the plenum that extends around the rotor axis of the gas turbine in a circular path, and using the at least one combustion fluid injector to entrain sufficient gasses in the vortex to establish a high enough flue gas re-circulation rate to enable the generation of a highly diluted combustion mode in the plenum during combustion;
- and
- using a plurality of out of phase pulsating jets to inject the air and fuel into the combustion chamber.
Dependencies are inferred from the claim text.