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      Assessment of Engine and Vehicle Performance Using Integrated Hybrid-Electric Propulsion Models

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          Abstract

          NASA is actively funding research into advanced, unconventional aircraft and engine architectures to achieve drastic reductions in vehicle fuel burn, noise, and emissions. One such concept is being explored by The Boeing Company, the General Electric Company, Virginia Polytechnic Institute and State University, and the Georgia Institute of Technology under the Subsonic Ultra Green Aircraft Research Project. A major cornerstone of this research is evaluating the potential performance benefits that can be attributed to using hybrid-electric propulsion. Hybrid-electric propulsion in this context involves a non-Brayton power generation or storage source, such as a battery or a fuel cell that can be used to provide additional propulsive energy to a conventional Brayton-cycle-powered turbofan engine. This research constructs an integrated Numerical Propulsion System Simulation hybrid-electric propulsion model capable of predicting hybrid-electric engine performance throughout the operational envelope. The system consists of a battery-powered motor partially driving the low-pressure shaft of a conventional turbofan engine. The applied motor power adds an additional degree of freedom, along with power setting, available to the aircraft designer during mission analysis. Modeling features and issues unique to hybrid-electric propulsion systems are described, and a vehicle trade study is carried out to determine the optimum engine cycle for both a cryogenic and conventionally driven motor system.

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          Most cited references21

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          Assessment of Future Aero-Engine Designs with Intercooled and Intercooled Recuperated Cores

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            Composites get in deep with new-generation engine

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                Author and article information

                Conference
                jpp
                Journal of Propulsion and Power
                J. Propulsion
                American Institute of Aeronautics and Astronautics
                0748-4658
                1533-3876
                31 August 2016
                November-December 2016
                : 32
                : 6
                : 1305-1314
                Affiliations
                Georgia Institute of Technology , Atlanta, Georgia 30332
                Author notes
                [*]

                Senior Research Engineer I, School of Aerospace Engineering. Member AIAA.

                [†]

                Graduate Research Assistant, School of Aerospace Engineering. Member AIAA.

                [‡]

                Boeing Professor of Advanced Aerospace Systems Analysis, School of Aerospace Engineering. Fellow AIAA.

                Article
                B35744 B35744
                10.2514/1.B35744
                70582e09-800c-4b0f-b1c2-0d284326af27
                Copyright © 2016 by Georgia Tech Research Corporation. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Copies of this paper may be made for personal and internal use, on condition that the copier pay the per-copy fee to the Copyright Clearance Center (CCC). All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the ISSN 0748-4658 (print) or 1533-3876 (online) to initiate your request.
                History
                : 27 January 2015
                : 2 September 2015
                : 15 April 2016
                Page count
                Figures: 11, Tables: 10
                Categories
                Full-Length Paper

                Engineering,Physics,Mechanical engineering,Space Physics
                Engineering, Physics, Mechanical engineering, Space Physics

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