公开(公告)号：US20240376845A1

公开(公告)日：2024-11-14

申请号：US18777670

申请日：2024-07-19

Applicant: ROLLS-ROYCE plc

Inventor： Craig W. BEMMENT ,  Benjamin J. Keeler ,  Kevin R. McNally ,  Andrea Minelli

IPC: F02C7/14 ,  F02C7/36 ,  F23K5/20

Abstract: A method of operating a gas turbine engine, the gas turbine engine including an engine core comprising a turbine, a compressor, a combustor arranged to combust a fuel, and a core shaft connecting the turbine to the compressor; a fan located 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 arranged to supply oil to lubricate the main gearbox; and a heat exchange system arranged 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 controlling the heat exchange system so as to raise the fuel temperature to at least 135° C. on entry to the combustor at cruise conditions.