公开(公告)号：US11970975B2

公开(公告)日：2024-04-30

申请号：US17476129

申请日：2021-09-15

Applicant: ROLLS-ROYCE PLC

Inventor： Chloe J Palmer ,  Guy D Snowsill ,  Jonathan E Holt

IPC: F02C7/224 ,  F02C3/20 ,  F02C3/22 ,  F02C7/04 ,  F02C7/14 ,  F02C7/143 ,  F02C7/18 ,  F02C7/22 ,  F23R3/04 ,  F23R3/28 ,  F02C9/40

CPC classification number: F02C7/224 ,  F02C3/20 ,  F02C3/22 ,  F02C7/04 ,  F02C7/14 ,  F02C7/143 ,  F02C7/18 ,  F02C7/22 ,  F02C7/222 ,  F23R3/04 ,  F23R3/286 ,  F02C9/40 ,  F05D2220/32 ,  F05D2240/35

Abstract: A fuel delivery system (201) is shown for delivering the hydrogen fuel from a cryogenic storage system to a fuel injection system in a gas turbine engine. The fuel delivery system includes a pump (301), a metering device (302), and a fuel heating system (303,304) for heating the hydrogen fuel to an injection temperature for the fuel injection system.

公开(公告)号：US11739700B2

公开(公告)日：2023-08-29

申请号：US17697761

申请日：2022-03-17

Applicant: ROLLS-ROYCE plc

Inventor： Peter Swann ,  Jonathan E Holt

IPC: F02C9/28 ,  A01G15/00 ,  B64D31/00 ,  B64D37/30 ,  F02C3/22 ,  F02C9/40 ,  B64D27/16

CPC classification number: F02C9/28 ,  A01G15/00 ,  B64D27/16 ,  B64D31/00 ,  B64D37/30 ,  F02C3/22 ,  F02C9/40

Abstract: An aircraft propulsion system includes a hydrocarbon fuel store, a hydrogen fuel store, an engine system capable of producing thrust by combusting hydrocarbon fuel and/or combusting or oxidising hydrogen fuel, a conveying system to convey hydrocarbon and hydrogen fuel from the fuel stores to the engine system and a control system to control the respective flow rates of the fuel within the conveying system. The control system adapts the fractions of the total fuel energy flow rate to the engine system represented by the hydrocarbon and hydrogen fuel energy flow rates in order to reduce climate warming impact caused by at least one of carbon dioxide, water vapour and condensation trails and/or increase climate cooling impact caused by condensation trails produced by the aircraft propulsion system compared to a dual-fuel propulsion system in which a reserve of hydrocarbon fuel is entirely combusted before any of a reserve of hydrogen fuel.