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    Aircraft operation
    11.
    发明授权
    Aircraft operation 有权

    公开(公告)号：US11859565B2

    公开(公告)日：2024-01-02

    申请号：US17853333

    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: F02C9/28

    CPC classification number: F02C9/28 ,  F05D2220/323 ,  F05D2240/35 ,  F05D2270/303 ,  F05D2270/309 ,  F05D2270/3013

    Abstract: A gas turbine engine includes: a combustor that combust the fuel and having an exit, a combustor exit temperature (T40) is the average temperature of flow and a combustor exit pressure (P40) is the total pressure there; a turbine including a rotor having a leading edge and a trailing edge, and wherein a turbine rotor entry temperature (T41) is an average temperature of flow at the leading edge and a turbine rotor entry pressure (P41) is the total pressure there; and a compressor having an exit, wherein a compressor exit temperature (T30) is the average temperature of flow at the exit from the compressor and a compressor exit pressure (P30) is the total pressure there (all at cruise conditions). A method of determining at least one fuel characteristic includes changing a fuel supplied to the engine; and determining a change in a relationship between T30 or P30, T40 and T41, or of P40 and P41, respectively.

    Aircraft propulsion
    12.
    发明授权
    Aircraft propulsion 有权

    公开(公告)号：US12240614B2

    公开(公告)日：2025-03-04

    申请号：US18209136

    申请日：2023-06-13

    Applicant: ROLLS-ROYCE plc

    Inventor： Peter Swann ,  Craig W Bemment ,  Alastair G Hobday ,  Benjamin J Keeler ,  Christopher P Madden

    IPC: B64D37/04 ,  B64D27/10 ,  B64D41/00 ,  F02C7/22 ,  F02C9/26

    Abstract: A power system for an aircraft includes one or more gas turbine engines arranged to burn a fuel so as to provide power to the aircraft; a plurality of fuel tanks each arranged to contain a fuel to be used to provide power to the aircraft; and a fuel manager. At least two of the fuel tanks contain different fuels, which have different proportions of a sustainable aviation fuel. The fuel manager is arranged to store information on the fuel contained in each fuel tank; and to control fuel supply so as to select a specific fuel accordingly to power at least the majority of operations on the ground. The fuel manager may additionally identify which tank contains the fuel with the highest proportion of a sustainable aviation fuel; and that fuel may be used to power at least the majority of operations on the ground.

    Engine parameters
    17.
    发明授权
    Engine parameters 有权

    公开(公告)号：US11643980B1

    公开(公告)日：2023-05-09

    申请号：US17853233

    申请日：2022-06-29

    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

    CPC classification number: F02C9/28 ,  F05D2220/323 ,  F05D2270/30

    Abstract: A method of determining a calorific value of fuel supplied to a gas turbine engine of an aircraft comprises sensing at least one engine parameter during a first time period of aircraft operation during which the gas turbine engine uses the fuel; and, based on the at least one sensed engine parameter, determining a calorific value of the fuel. The sensing may be repeated such that the at least one engine parameter is monitored over time. The gas turbine engine may be a propulsive gas turbine engine of the aircraft or a gas turbine engine of an auxiliary power unit of the aircraft.

    Aircraft refuelling
    19.
    发明授权
    Aircraft refuelling 有权

    公开(公告)号：US12241423B2

    公开(公告)日：2025-03-04

    申请号：US18125431

    申请日：2023-03-23

    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: F02C9/40 ,  F02C9/28

    Abstract: A method of refuelling an aircraft comprising a gas turbine engine and a fuel tank arranged to provide fuel to the gas turbine engine comprises obtaining an amount of energy required for an intended flight profile; obtaining a calorific value of fuel available to the aircraft for refuelling; calculating the amount of the available fuel needed to provide the required energy; and refuelling the aircraft with the calculated amount of the available fuel. The calculating the amount of the available fuel needed to provide the required energy may comprise obtaining an energy content of fuel already in the fuel tank and subtracting that from the determined amount of energy required for the intended flight profile.

    Aircraft operation
    20.
    发明授权
    Aircraft operation 有权

    公开(公告)号：US12241422B2

    公开(公告)日：2025-03-04

    申请号：US18212290

    申请日：2023-06-21

    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: F02C9/28

    Abstract: A method of determining at least one fuel characteristic of a fuel provided to a gas turbine engine of an aircraft includes making an operational change, the operational change being effected by a controllable component of a propulsion system of which the gas turbine engine forms a part, and being arranged to affect operation of the gas turbine engine, sensing a response to the operational change; and determining the at least one fuel characteristic based on the response to the operational change.

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