Method of operating a multi-stage flamesheet combustor
AssigneeAnsaldo Energia Switzerland AG
InventorsPeter John Stuttaford, Khalid Oumejjoud, Fred Hernandez, Hany Rizkalla, Timothy Hui, Matthew Yaquinto, Jesse Sewell
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Abstract
The present invention discloses a novel way of controlling a gas turbine engine using detected temperatures and detected turbine rotor speed. An operating system provides a series of operating modes for a gas turbine combustor through which fuel is staged to gradually increase engine power, yet harmful emissions, such as carbon monoxide, are kept within acceptable levels.
Claims20
A computerized method, implemented by a processing unit, for staging fuel in a gas turbine combustor where the gas turbine combustor has a pilot fuel nozzle, a set of pilot tune stage injectors for tuning the pilot fuel nozzle and a main set of fuel injectors, the method comprising the steps of:
- operating the combustor in a first mode in which the fuel is injected into the combustor by the pilot fuel nozzle until a first temperature is detected;
- upon detecting the first temperature, operating the combustor in a second mode in which the fuel is injected into the combustor by the pilot fuel nozzle and the set of pilot tune stage injectors until a second temperature is detected;
- upon detecting the second temperature, operating the combustor in a third mode in which the fuel is injected into the combustor by the pilot fuel nozzle, the set of pilot tune stage injectors, and a first portion of the main set of fuel injectors until a third temperature is detected;
- and
- upon detecting the third temperature, operating the combustor in a fourth mode in which the fuel is injected into the combustor by the pilot fuel nozzle, set of pilot tune stage injectors, the first portion of the main set of fuel injectors and a second portion of the main set of fuel injectors.
A method of operating a gas turbine combustor comprising:
- supplying fuel to a pilot fuel nozzle of the gas turbine engine and to a set of pilot tune stage injectors until a second temperature is detected, wherein the set of pilot tune stage injectors are positioned radially outward of the pilot fuel nozzle;
- upon detecting the second temperature, supplying the fuel to a first portion of a set of main fuel injectors, the pilot fuel nozzle, and the set of pilot tune stage injectors until a third temperature is detected;
- and
- upon detecting the third temperature, supplying the fuel to a second portion of the set of main fuel injectors, the first portion of the set of main injectors, the pilot fuel nozzle and the set of pilot tune stage injectors.
Dependencies are inferred from the claim text.