公开(公告)号：US20190032576A1

公开(公告)日：2019-01-31

申请号：US16047089

申请日：2018-07-27

Applicant: ROLLS-ROYCE plc

Inventor： Carl L. MULDAL ,  Stephen P. KING ,  Andrew RIMELL

IPC: F02C9/28 ,  F02C7/232 ,  F02C9/26 ,  F01D17/08 ,  F23R3/28

Abstract: A method of determining a fuel delivery fault in a gas turbine engine is provided, the engine having a combustor, a combustor fuel system for delivering fuel to the combustor, and a turbine which is driven by hot gas from the combustor. The method includes comparing a measured turbine gas temperature profile against a predicted turbine gas temperature profile. The method further includes comparing a measured combustor instability against a predicted combustor instability. The method further includes indicating that a fuel delivery fault in the combustor fuel system has been detected when both the measured turbine gas temperature profile and the measured combustor instability differ from their predicted values by more than respective predetermined thresholds.

公开(公告)号：US20190032509A1

公开(公告)日：2019-01-31

申请号：US16047081

申请日：2018-07-27

Applicant: ROLLS-ROYCE plc

Inventor： Carl L. MULDAL ,  Stephen P. KING ,  Andrew RIMELL

IPC: F01D21/00 ,  F02C7/22 ,  F23R3/34

Abstract: A method of determining a fuel delivery fault in a gas turbine engine is provided, the engine having a combustor, a combustor fuel system for delivering fuel to the combustor, and a turbine which is driven by hot gas from the combustor. The method includes comparing a measured turbine gas temperature profile against a predicted turbine gas temperature profile. The method further includes comparing a measured fuel delivery flow number of the combustor fuel system against a predicted fuel delivery flow number of the combustor fuel system. The method further includes indicating that a fuel delivery fault in the combustor fuel system has been detected when both the measured turbine gas temperature profile and the measured fuel delivery flow number differ from their predicted values by more than respective predetermined thresholds.

公开(公告)号：US20200025386A1

公开(公告)日：2020-01-23

申请号：US16276669

申请日：2019-02-15

Applicant: ROLLS-ROYCE plc

Inventor： Carl L. MULDAL ,  Luca TENTORIO ,  Hua Wei HUANG ,  Juan Carlos ROMAN CASADO

IPC: F23R3/34 ,  F02K9/50 ,  F23R3/14

Abstract: A lean burn fuel injector has a head which has a coaxial arrangement of an inner pilot air-blast fuel injector and an outer main air-blast fuel injector. The pilot fuel injector comprises coaxially arranged inner and outer air swirler passages. The main fuel injector comprises coaxially arranged inner and outer air swirler passages. A first splitter is arranged between the passages. The first splitter has a conical divergent downstream portion. A second splitter is arranged radially within and spaced from the first splitter. The second splitter has a conical convergent portion and a conical divergent downstream portion. The downstream end of the second splitter is upstream of the downstream end of the first splitter. A connecting member connects the downstream end of the second splitter and the downstream portion of the first splitter upstream of the downstream end of the first splitter to form a sharp edge.