An aircraft gas turbine engine includes a fan system having a reverse traveling wave first flap mode, Fan RTW, and including a fan upstream of the engine core; a fan shaft; and a front engine structure to support the shaft and having a front engine structure nodding mode FSN including two modes at similar, but unequal, natural frequencies in orthogonal directions; and a gearbox. The engine includes a gearbox, and a gearbox output shaft to couple output of the gearbox to the fan shaft. An LP rotor system including the fan system and the gearbox output shaft has a first reverse whirl rotor dynamic mode, Rotor RW. A frequency margin of:⁢the⁢⁢frequency⁢⁢difference⁢⁢between⁢⁢mode⁢⁢⁢⁢FSN⁢⁢and⁢⁢the⁢⁢highest⁢⁢frequency⁢⁢of⁢⁢either⁢⁢⁢⁢synchronous⁢⁢Fan⁢⁢RTW⁢⁢or⁢⁢synchronous⁢⁢Rotor⁢⁢RW⁢the⁢⁢lowest⁢⁢natural⁢⁢frequency⁢⁢of⁢⁢⁢⁢the⁢⁢front⁢⁢structure⁢⁢nodding⁢⁢pair⁢⁢of⁢⁢modesis in the range from 5 to 50%.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Aircraft gas turbine engine with improved response to rotor unbalance


    Beteiligte:

    Erscheinungsdatum :

    07.06.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / F02K JET-PROPULSION PLANTS , Strahltriebwerke / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS



    Aircraft Engine Response Due to Fan Unbalance

    Biehl, F. A. / Leve, H. L. | SAE Technical Papers | 1969


    Rotor support device, rotor, gas turbine engine, and aircraft

    KATO HIROKI / KIKUCHI MAKI | Europäisches Patentamt | 2023

    Freier Zugriff

    ROTOR SUPPORT DEVICE, ROTOR, GAS TURBINE ENGINE, AND AIRCRAFT

    KATO HIROKI / KIKUCHI MAKI | Europäisches Patentamt | 2019

    Freier Zugriff

    Correcting Generator Rotor Unbalance

    British Library Online Contents | 1997