公开(公告)号：US20180163966A1

公开(公告)日：2018-06-14

申请号：US15821268

申请日：2017-11-22

Applicant: ROLLS-ROYCE PLC

Inventor： David I. Jones ,  Michael Whiteman ,  Daniel J. Bickley

IPC: F23R3/28 ,  F02C7/22 ,  F02C7/236 ,  F02C9/26

CPC classification number: F23R3/283 ,  F02C7/222 ,  F02C7/232 ,  F02C7/236 ,  F02C9/26 ,  F02C9/263 ,  F02C9/34 ,  F05D2260/602 ,  F05D2270/301 ,  F23D2209/30 ,  F23K5/06 ,  F23K2203/105 ,  F23R3/34 ,  Y02T50/671

Abstract: A fuel supply system for fuel injectors of a multi-stage combustor of a gas turbine engine. The fuel supply system includes a metering and splitting arrangement which receives a total fuel flow and controllably meters and splits the received total fuel flow into metered pilot and mains flows. The fuel supply system further includes a de-priming sub-system, one or more fuel lines of a mains fuel distribution pipework being fluidly connected to the mains fuel discharge orifices and extending to the de-priming sub-system, and the de-priming sub-system being configured to remove the mains fuel from the injectors. A re-priming sub-system, the one or more fuel lines of the mains fuel distribution pipework also extending to the re-priming sub-system, and the re-priming sub-system being configured to refill the injectors with mains fuel through the one or more fuel lines when the mains distribution pipework is selected for pilot and mains operation.