公开(公告)号：US20230193834A1

公开(公告)日：2023-06-22

申请号：US17853117

申请日：2022-06-29

Applicant: ROLLS-ROYCE plc

Inventor： Benjamin J. KEELER ,  David M. BEAVEN ,  Craig W. BEMMENT ,  Paul W. FERRA ,  Kevin R. MCNALLY ,  Andrea MINELLI ,  Martin K. YATES

IPC: F02C9/22

CPC classification number: F02C9/22 ,  F05D2270/07 ,  F05D2270/309 ,  F05D2220/323

Abstract: A method of controlling a propulsion system of an aircraft, the propulsion system comprising a gas turbine engine arranged to be powered by a fuel and at least one variable inlet guide vane—VIGV, comprises obtaining at least one fuel characteristic of the fuel being provided to the gas turbine engine; and making a change to scheduling of the at least one VIGV based on the at least one obtained fuel characteristic.

公开(公告)号：US20230324319A1

公开(公告)日：2023-10-12

申请号：US17853184

申请日：2022-06-29

Applicant: ROLLS-ROYCE PLC

Inventor： Craig W. BEMMENT ,  Paul W. FERRA ,  Alastair G. HOBDAY ,  Benjamin J. KEELER ,  Kevin R. MCNALLY ,  Andrea MINELLI ,  Martin K. YATES

IPC: G01N25/22 ,  F02C7/22

CPC classification number: G01N25/22 ,  F02C7/22 ,  F05D2220/323

Abstract: A method of checking refuelling of an aircraft comprising a gas turbine engine and a fuel tank arranged to provide fuel to the gas turbine engine comprises: receiving an input of calorific value data for fuel provided to the aircraft on refuelling; independently determining at least one of: (i) the calorific value of fuel supplied to the gas turbine engine in use; and (ii) the calorific value of the fuel provided to the aircraft on refuelling; and providing an alert if the determined calorific value is inconsistent with the calorific value data input received

公开(公告)号：US20250059923A1

公开(公告)日：2025-02-20

申请号：US18933409

申请日：2024-10-31

Applicant: ROLLS-ROYCE plc

Inventor： Craig W. BEMMENT ,  Benjamin J. KEELER ,  Paul W. FERRA ,  Alastair G. HOBDAY ,  Kevin R. MCNALLY ,  Andrea MINELLI ,  Martin K. YATES

IPC: F02C9/28 ,  B64D27/12 ,  B64D37/00 ,  B64D41/00

Abstract: The present application discloses a method of determining one or more fuel characteristics of an aviation fuel suitable for powering a gas turbine engine of an aircraft, the method comprising: determining a mass of a fuel being loaded, or which has been loaded, onto the aircraft; determining a corresponding volume of the fuel; determining one or more fuel characteristics of the fuel based on the determined mass and volume. Also disclosed is a fuel characteristic determination system, a method of operating an aircraft, and an aircraft.

公开(公告)号：US20240209780A1

公开(公告)日：2024-06-27

申请号：US18337546

申请日：2023-06-20

Applicant: ROLLS-ROYCE PLC

Inventor： Craig W. BEMMENT ,  Benjamin J. KEELER ,  Kevin R. MCNALLY ,  Andrea MINELLI

IPC: F02C7/14 ,  F02C7/36 ,  F23K5/20

CPC classification number: F02C7/14 ,  F02C7/36 ,  F23K5/20 ,  F05D2260/20 ,  F23K2300/204

Abstract: A method of operating a gas turbine engine, the engine including an engine core with a turbine, a compressor, a combustor arranged to combust a fuel, and a core shaft connecting the turbine to the compressor; a fan upstream of the engine core; a fan shaft; a main gearbox that receives an input from the core shaft and outputs drive to the fan via the fan shaft; a primary oil loop system to supply oil to lubricate the main gearbox; and a heat exchange system to transfer heat between the oil and the fuel, the oil having an average temperature of at least 180° C. on entry to the heat exchange system at cruise conditions. The method includes transferring heat from the oil to the fuel to lower the fuel viscosity to a value of less than or equal to 0.58 mm2/s on entry to the combustor at cruise conditions.