公开(公告)号：US12168958B2

公开(公告)日：2024-12-17

申请号：US18211809

申请日：2023-06-20

Applicant: ROLLS-ROYCE PLC

Inventor： Christopher P Madden ,  Craig W Bemment ,  Andrew T Smith ,  Peter Swann

IPC: F23R3/28 ,  B64D27/10 ,  F02C7/264

Abstract: A method of operating a gas turbine engine having a combustor having a combustion chamber and a plurality of fuel spray nozzles configured to inject fuel into the combustion chamber. The fuel spray nozzles have a first subset of fuel spray nozzles and a second subset of fuel spray nozzles. The combustor is operable in a condition in which the first subset of fuel spray nozzles are supplied with more fuel than the second subset of fuel spray nozzles. A ratio of the number of fuel spray nozzles in the first subset of fuel spray nozzles to the number of fuel spray nozzles in the second subset of fuel spray nozzles is in the range of 1:2 to 1:5. The method includes providing a fuel to the plurality of fuel spray nozzles having a calorific value of at least 43.5 MJ/kg. A gas turbine engine can be for an aircraft.

公开(公告)号：US20240410581A1

公开(公告)日：2024-12-12

申请号：US18669683

申请日：2024-05-21

Applicant: ROLLS-ROYCE plc

Inventor： Edward A. WALTERS

IPC: F23R3/00

Abstract: A combustor assembly for a gas turbine engine includes a combustor shell extending along a shell axis. The combustor shell includes a shell wall extending around the shell axis and a meter panel connected to an upstream end of the shell wall. The shell wall and the meter panel together define a combustion space therebetween. The combustor assembly further includes: a tile disposed within the combustor shell and including a tile flange portion extending radially with respect to the shell axis; a heatshield connected to the meter panel and extending at least radially towards the tile; a fastener connecting the tile flange portion to the meter panel; and a compartment thermally shielded from the combustion space. Either the heatshield and the tile together form the compartment or the tile alone forms the compartment. The fastener is spaced apart from the combustion space and at least partially disposed within the compartment.

公开(公告)号：US20240401531A1

公开(公告)日：2024-12-05

申请号：US18420204

申请日：2024-01-23

Applicant: ROLLS-ROYCE plc

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

IPC: F02C7/14 ,  F02C7/16 ,  F02C7/22

Abstract: A method of operating a gas turbine engine and a gas turbine engine includes a fuel delivery system arranged to provide fuel, a combustor arranged to combust at least a proportion of the fuel, a primary fuel-oil heat exchanger arranged to have up to 100% of the fuel provided by the fuel delivery system flow therethrough, and a secondary fuel-oil heat exchanger arranged to have a proportion of the fuel from the primary fuel-oil heat exchanger flow therethrough. Fuel is arranged to flow from the primary fuel-oil heat exchanger to the secondary fuel-oil heat exchanger whereas oil is arranged to flow from the secondary fuel-oil heat exchanger to the primary fuel-oil heat exchanger. A fuel viscosity is adjusted to a maximum of 0.58 mm2/s on entry to the combustor at cruise conditions.

公开(公告)号：US20240399445A1

公开(公告)日：2024-12-05

申请号：US18667726

申请日：2024-05-17

Applicant: ROLLS-ROYCE PLC

Inventor： Neil D'SOUZA ,  Kevin GOODWIN ,  John D LEHANE ,  Martin R PERRY

IPC: B22C9/04 ,  B22C7/02 ,  B22D25/06 ,  B22D27/20

Abstract: A method of manufacturing a component includes forming a mould assembly including an initial mould unit, providing a seed crystal including a primary growth direction, determining an optimal angular orientation of the unit, rotating the unit to dispose the unit's optimal angular orientation, encasing the unit in a refractory material, and forming a refractory mould unit having a component mould including a mould wall defining a mould cavity, and a seed holder. In the optimal angular orientation, the seed crystal's primary growth direction is angled away from the wall, thereby forming a converging disposition with the wall in a of the wall's first region facing the central sprue and a diverging disposition with the wall in the wall's second region facing a mould heater. The method includes receiving the seed crystal within the seed holder and filling the mould cavity with molten castable material to form the component.

公开(公告)号：US12158438B2

公开(公告)日：2024-12-03

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

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：US20240392970A1

公开(公告)日：2024-11-28

申请号：US18652125

申请日：2024-05-01

Applicant: ROLLS-ROYCE plc

Inventor： Stephen C. HARDING

IPC: F23R3/42 ,  F02C3/14

Abstract: A combustor assembly for a gas turbine engine comprises a combustor casing. The combustor casing has a diametral height D and an axial length L. An Aspect Ratio parameter S is defined as: S = D L and the S parameter lies in the range of 0.30 to 1.00.

公开(公告)号：US20240392855A1

公开(公告)日：2024-11-28

申请号：US18670836

申请日：2024-05-22

Applicant: ROLLS-ROYCE plc

Inventor： Victor P A MEDEAU ,  Silvestre T. PINHO ,  Lorenzo MENCATTELLI ,  Emile S. GREENHALGH ,  Soraia PIMENTA ,  MohammadErfan KAZEMI ,  James A. FINLAYSON

IPC: F16F7/00 ,  F01D5/28

Abstract: A kinetic energy absorptive composite article comprising a plurality of plies, and a method of manufacturing the kinetic energy absorptive composite article. Each ply comprises a plurality of substantially parallel fibers encapsulated within a resin. A plurality of localised weaknesses are comprised within the fibers of the kinetic energy absorptive composite article, the locations of the plurality of localised weaknesses forming a pre-defined pattern. The pre-defined pattern comprises a first sub-pattern and a second sub-pattern superposed upon the first sub-pattern. The first sub-pattern is configured so that a crack formed by an impact event propagates substantially along a predetermined fracture path to separate the kinetic energy absorptive composite article into at least a first portion and a second portion and the second sub-pattern is configured to set a threshold below which the crack does not propagate.

公开(公告)号：US12152542B2

公开(公告)日：2024-11-26

申请号：US18328991

申请日：2023-06-05

Applicant: ROLLS-ROYCE plc

Inventor： Peter Swann ,  David M. Beaven ,  Craig W. Bemment ,  Alastair G. Hobday ,  Benjamin J. Keeler ,  Christopher P. Madden ,  Martin K. Yates

IPC: F02C9/40 ,  F02C9/28

Abstract: The present application provides 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 includes: passing UV-visual spectrum light through the fuel; measuring a transmittance parameter indicating the transmittance of light through the fuel; determining one or more fuel characteristics of the fuel based on the transmittance parameter; and communicating the one or more fuel characteristic to a control module of the gas turbine engine or the aircraft. Also disclosed is a fuel characteristic determination system, a method of operating an aircraft, and an aircraft.

公开(公告)号：US20240384658A1

公开(公告)日：2024-11-21

申请号：US18646115

申请日：2024-04-25

Applicant: ROLLS-ROYCE plc

Inventor： Jonathon BAILEY ,  Basile VIGNERON

IPC: F01D9/04

Abstract: A single-piece annular vane array for a gas turbine engine. The single-piece annular vane array comprises at least one mounting feature, a ring of stator vanes, and at least one baffle. The at least one baffle is attached at a first radial location to the ring of stator vanes, and is attached at a second radial location to the at least one mounting feature. The at least one baffle is deformable.

公开(公告)号：US12135313B2

公开(公告)日：2024-11-05

申请号：US17958996

申请日：2022-10-03

Applicant: ROLLS-ROYCE plc

Inventor： Duncan A Macdougall ,  Julian M Reed ,  Sophoclis Patsias ,  Antonio Pellegrino ,  Clive R Siviour ,  Daniel Eakins ,  Yuan Xu ,  Junyi Zhou

IPC: G01N3/30 ,  G01N3/02

Abstract: A system for measuring loading on a test specimen. The system includes the test specimen arranged between a first loading bar and a second loading bar. The system further includes a first loading unit and a second loading unit configured to apply a first load and a second load to the first and second loading bars, respectively. The system further includes a first clamp and a second clamp configured to hold the first and second loading bars against the first and second loads, respectively. The system further includes a clamp actuating unit configured to selectively release at least the first clamp. The clamp actuating unit further includes a controller configured to electrically actuate at least one first electromechanical transducer from a retained state to a released state to release the first clamp, such that the first loading bar applies a first loading wave to the test specimen.