Patent ID: 11879393
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A method, comprising:
controlling, with a controller, a fuel flow split between a primary flow to one or more primary fuel nozzles of a nozzle assembly on a primary flow line and a secondary flow to a plurality of secondary flow nozzles of the nozzle assembly on a secondary flow line to control combustor tone, wherein controlling the fuel flow split between the one or more primary fuel nozzles and the plurality of secondary flow nozzles includes controlling a position of a secondary metering valve disposed on the secondary flow line downstream of a split between the primary flow line and the secondary flow line, and further includes a splitter valve disposed on the secondary flow line, downstream of the secondary metering valve,
wherein the controller is configured to control the position of the secondary metering valve to control a secondary flow rate of the secondary flow as a function of the position of the secondary metering valve to schedule the fuel flow split between the one or more primary fuel nozzles and the plurality of secondary fuel nozzles by modulating the secondary flow;
the method further comprising splitting, with the splitter valve, the secondary flow between the plurality of secondary flow nozzles to provide flow maldistribution between the secondary flow nozzles to control combustor tone, wherein splitting the secondary flow between the plurality of secondary flow nozzles includes controlling a position of the splitter valve as a function of secondary flow.