US 12,006,881 B2
Method of controlling a combustor
Brian Beesley, Lincoln (GB); and Dorian Skipper, Lincoln (GB)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 18/253,934
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed Nov. 26, 2021, PCT No. PCT/EP2021/083219
§ 371(c)(1), (2) Date May 23, 2023,
PCT Pub. No. WO2022/117464, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 2018929 (GB), filed on Dec. 1, 2020.
Prior Publication US 2024/0011444 A1, Jan. 11, 2024
Int. Cl. F02C 9/34 (2006.01); F02C 7/228 (2006.01); F02C 9/28 (2006.01); F23R 3/34 (2006.01)
CPC F02C 9/34 (2013.01) [F02C 7/228 (2013.01); F02C 9/28 (2013.01); F23R 3/343 (2013.01); F05D 2270/08 (2013.01); F05D 2270/31 (2013.01); F23R 3/34 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of controlling a combustor of a gas turbine engine, the combustor being supplied a total fuel quantity dependent on a load of the gas turbine engine, the total fuel quantity is split into a pilot fuel quantity and a main fuel quantity via a pilot fuel split, the pilot fuel split is a percentage of the pilot fuel quantity to the total fuel quantity, wherein the method comprises:
monitoring at least one signal of at least one condition of the gas turbine engine,
generating a steady state value of the at least one signal, wherein the steady state value of the at least one signal is indicative of a steady state of the gas turbine engine,
detecting a change in the steady state value, the detecting occurring when the change in the value exceeds a predetermined limit,
generating transient pilot split offsets for the pilot fuel split from a look-up table, and
applying a transient pilot split offset from the generated transient pilot split offsets to the pilot fuel split while maintaining the total fuel quantity being supplied at any point in time,
wherein, when the change in the steady state value comprises a reduction from a peak value the transient pilot split offset is gradually reduced to a zero value,
wherein the gradually reducing of the transient pilot split offset comprises a maximum reduction rate with a first maximum rate of reducing and a second maximum rate of reducing, wherein the first maximum rate of reducing is greater than the second maximum rate of reducing the transient pilot split offset.