NASA and a variety of aerospace industry stakeholders are investing in conceptual studies of electrified aircraft, including parallel hybrid electric aircraft such as the Subsonic Ultra Green Aircraft Research (SUGAR) Volt. At this point, little of the work published in the literature has examined the transient behavior of the turbomachinery in these systems. This paper describes a control system built around the hFan, the parallel hybrid electric turbofan engine designed for the SUGAR Volt concept aircraft. This control system is used to show that the hFan, running with its baseline concept of operations, is capable of transient operation throughout the envelope. The design parameters of this controller are varied to assess the amount of operability margin built into the engine design, and whether this margin can be reduced to enable more aggressive designs, that may feature better fuel economy. Further, studies are performed as parameters for the hFan electric motor are varied to determine how the motor impacts the engine's need for transient operability margin. The studies suggest that the engine may be redesigned with as much as a 3% reduction in high pressure compressor stall margin. It was also demonstrated that appropriate design and control of the electric motor may be able to buy an additional 0.5% stall margin reduction or a turbine inlet temperature reduction of 35 R, as tested at the sea-level static condition.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Dynamic Analysis of the hFan, a Parallel Hybrid Electric Turbofan Engine


    Contributors:

    Conference:

    AIAA/SAE/ASEE Joint Propulsion Conference ; 2018 ; Cincinnati, OH, United States
    AIAA Propulsion and Energy Forum 2018 ; 2018 ; Cincinnati, OH, United States


    Publication date :

    2018-07-11


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Dynamic Analysis of the hFan, a Parallel Hybrid Electric Turbofan Engine

    Thomas, George L. / Culley, Dennis E. / Kratz, Jonathan L. et al. | AIAA | 2018


    Dynamic Analysis of the hFan, a Parallel Hybrid Electric Turbofan Engine (AIAA 2018-4797)

    Thomas, George L. / Culley, Dennis E. / Kratz, Jonathan L. et al. | British Library Conference Proceedings | 2018


    Parallel Hybrid Gas-Electric Geared Turbofan Engine Conceptual Design and Benefits Analysis

    Lents, Charles / Hardin, Larry / Rheaume, Jonathan et al. | NTRS | 2016


    Parallel Hybrid Gas-Electric Geared Turbofan Engine Conceptual Design and Benefits Analysis

    Lents, Charles E. / Hardin, Larry W. / Rheaume, Jonathon et al. | AIAA | 2016


    PARALLEL HYBRID POWERPLANT WITH TURBOFAN ENGINE CORE

    ANDERSON RICHARD PAT / SPITZER DAVID N / BARTSCH ERIC RICHARD et al. | European Patent Office | 2024

    Free access