公开(公告)号：US20230340910A1

公开(公告)日：2023-10-26

申请号：US18216954

申请日：2023-06-30

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： James Robert JARVO ,  Cedric SAINTIGNAN ,  Joseph Daniel Maxim CIRTWILL ,  Kian MCCALDON ,  Marc-Andre TREMBLAY ,  David WADDLETON

IPC: F02C7/30 ,  F02C7/236 ,  F02C7/232 ,  F02C7/22 ,  F02C9/32 ,  F02C9/42 ,  F02C7/228 ,  F02C6/00 ,  F02C6/16

CPC classification number: F02C7/30 ,  F02C6/00 ,  F02C6/16 ,  F02C7/222 ,  F02C7/228 ,  F02C7/232 ,  F02C7/236 ,  F02C9/32 ,  F02C9/42

Abstract: Methods and systems of operating a gas turbine engine in a low-power condition are provided. In one embodiment, the method includes supplying fuel to a combustor by supplying fuel to a first fuel manifold and a second fuel manifold of the gas turbine engine. The method also includes, while supplying fuel to the combustor by supplying fuel to the first fuel manifold: stopping supplying fuel to the second fuel manifold; and supplying pressurized air to the second fuel manifold to flush fuel in the second fuel manifold into the combustor and hinder coking in the second fuel manifold and associated fuel nozzles.