US 11,946,422 B2
Method of operating a combustor for a gas turbine
Ghenadie Bulat, Lincoln (GB); and Kristopher Calladine, Doncaster (GB)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 18/257,297
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed Dec. 13, 2021, PCT No. PCT/EP2021/085557
§ 371(c)(1), (2) Date Jun. 14, 2023,
PCT Pub. No. WO2022/128959, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 2019845 (GB), filed on Dec. 16, 2020.
Prior Publication US 2023/0392557 A1, Dec. 7, 2023
Int. Cl. F02C 9/40 (2006.01)
CPC F02C 9/40 (2013.01) [F05D 2270/082 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of operating a combustion system for a gas turbine, the combustor system comprises:
a main fuel supply,
a pilot fuel supply,
a combustion chamber,
the method comprises the steps
supplying a first fuel flow through the main fuel supply and the pilot fuel supply,
monitoring a composition of the first fuel,
monitoring combustion instability,
reducing the first fuel flow through the pilot fuel supply to zero when the first fuel composition has
a) a hydrogen content ≥5% by volume and/or b) a high-hydrocarbon (HC) content ≥5% by volume; and further
the combustion instability <a predetermined value.