公开(公告)号：US11149647B2

公开(公告)日：2021-10-19

申请号：US16679568

申请日：2019-11-11

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. Husband ,  Ahmed M Y Razak ,  Paul R. Miller

IPC: F02C7/26 ,  F02C3/06 ,  F02C9/22 ,  F04D27/00

Abstract: A method of controlling at least part of a start-up or re-light process of a gas turbine engine, the method comprising: increasing an angular velocity of a low pressure compressor; determining if an exit pressure of the low pressure compressor is equal to or greater than a first threshold pressure; in response to determining that the exit pressure of the low pressure compressor is equal to or greater than the first threshold pressure, controlling rotation of the low pressure compressor using a first electrical machine and controlling rotation of a high pressure compressor using a second electrical machine, to increase angular velocity of the high pressure compressor; determining if an exit pressure of the high pressure compressor is equal to or greater than a second threshold pressure.

公开(公告)号：US11365684B2

公开(公告)日：2022-06-21

申请号：US16679562

申请日：2019-11-11

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. Husband ,  Ahmed M Y Razak ,  Paul R. Miller

IPC: F02C7/26 ,  F02C7/262 ,  F02C7/275

Abstract: A method of controlling at least part of a start-up or re-light process of a gas turbine engine, the method comprising: determining when a flame in a combustion chamber of a gas turbine engine is extinguished, during a start-up process or re-light process or during operation; purging the combustion chamber by controlling rotation of a low pressure compressor using a first electrical machine, and controlling rotation of a high pressure compressor using a second electrical machine, the combustion chamber downstream of the low pressure compressor and high pressure compressor; and controlling rotation of the low pressure compressor using the first electrical machine, and controlling rotation of the high pressure compressor using the second electrical machine to restart the start-up process or perform the re-light process.

公开(公告)号：US11149648B2

公开(公告)日：2021-10-19

申请号：US16679576

申请日：2019-11-11

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. Husband ,  Ahmed M Y Razak ,  Paul R. Miller

IPC: F02C7/262 ,  F02C7/266

Abstract: A method of controlling at least part of a start-up or re-light process of a gas turbine engine, the method comprising: controlling ignition within a combustion chamber of the gas turbine engine; controlling rotation of a low pressure compressor using a first electrical machine, and controlling rotation of a high pressure compressor using a second electrical machine, the combustion chamber downstream of the low pressure compressor and high pressure compressor; determining if an exit pressure of the high pressure compressor is equal to or greater than a self-sustaining threshold pressure; and in response to determining that the exit pressure of the high pressure compressor is equal to or greater than the self-sustaining threshold pressure, ceasing controlling rotation of the low pressure compressor using the first electrical machine, and/or the high pressure compressor using a second electrical machine.