There is provided a method (300) of operating a gas turbine engine (10). The gas turbine engine (10) comprises an accessory gearbox (110) configured to power one or more engine accessories, and a combustor (16) in which fuel is combusted and a fuel-oil heat exchanger (114) arranged to transfer heat between oil and fuel that is provided to the combustor (16). An average temperature of lubricating oil is at least 180°C on exit from the accessory gearbox (110) at cruise conditions. The method (300) comprises transferring heat (301) from the oil to the fuel before the fuel enters the combustor (16) so as to raise the fuel temperature to an average of at least 135°C on entry to the combustor (16) at cruise conditions. Also provided is a gas turbine engine.


    Access

    Download


    Export, share and cite



    Title :

    Accessory gearbox


    Contributors:

    Publication date :

    2024-08-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F01D Strömungsmaschinen [Kraft- und Arbeitsmaschinen oder Kraftmaschinen], z.B. Dampfturbinen , NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES



    Accessory-drive gearbox

    Engineering Index Backfile | 1955


    Gearbox - Airframe Mounted Accessory

    SAE Technical Papers | 2016


    Non-pressurized accessory gearbox

    POSTER SCOTT DAVID / RILEY WALTER / COPE GARY et al. | European Patent Office | 2022

    Free access

    NON-PRESSURIZED ACCESSORY GEARBOX

    POSTER SCOTT DAVID / RILEY WALTER / COPE GARY et al. | European Patent Office | 2019

    Free access

    GEARBOX - AIRFRAME MOUNTED ACCESSORY

    SAE Technical Papers | 1991