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Design Space Exploration Study and Optimization of a Distributed Turbo-Electric Propulsion System for a Regional Passenger Aircraft

Biser, Stefan and Atanasov, Georgi and Hepperle, Martin and Filipenko, Mykhaylo and Keller, Dennis and Vechtel, Dennis and Boll, Martin and Kastner, Nir and Noe, Mathias (2020) Design Space Exploration Study and Optimization of a Distributed Turbo-Electric Propulsion System for a Regional Passenger Aircraft. In: AIAA Propulsion and Energy Forum and Exposition, 2020. AIAA Propulsion and Energy 2020 Forum, 2020-08-24 - 2020-08-28, VIRTUAL EVENT. doi: 10.2514/6.2020-3592. ISBN 978-162410602-6.

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Official URL: https://arc.aiaa.org/doi/10.2514/6.2020-3592


Electric propulsion systems are considered as one possibility to reach the ambitious goals of the European Union’s Flightpath 2050 with regards to greenhouse gas emissions and noise. It has been claimed in several publications that Distributed Electric Propulsion (DEP) offers significant improvement in aerodynamic efficiency and thus a reduction in structural weight of the wing and noise emissions as well as additional degrees of freedom concerning flight control. To not outweigh those advantages by heavier drivetrains, the components within the electric propulsion system have to be extremely lightweight, efficient and reliable at the same time. The German nationally funded project SynergIE evaluates DEP for a 70 PAX regional reference aircaft with two (SE-2), six (DEP-6) and twelve (DEP-12) propulsion units with a turbo-electric drivetrain layout. This study aims to quantify the effect on the specific block fuel consumption for the different numbers of propulsors based on Top Level Aircraft Requirements (TLARs). The approach contains a coupled electric drivetrain system model which is based on physically derived, analytical models for each component linking specific subdomains, e.g., electromagnetics, structural mechanics and thermal analysis. A genetic algorithm is applied to optimise the key performance indicators (KPIs) of the electric system, before the results are fed back to the aircraft sizing process. It has been identified that constraints such as installation space or architectural decisions such as the number of propulsors have significant influence on the drivetrain weight and efficiency and interact with the whole aircraft sizing process, esp. with reference to nacelleweight and drag and thus the block fuel consumption. The study shows that the DEP-6 and DEP-12 project aircraft both have a potential of reducing the specific block fuel consumption by approx. 4.2% and 5.8% respectively in case of direct driven propellers, while for a geared-drive scenario a total reduction of up to 7.6% in case of DEP-6 and 8.5% in case of DEP-12 is possible, all compared to the direct-driven baseline (BSL) aircraft SE-2.

Item URL in elib:https://elib.dlr.de/137633/
Document Type:Conference or Workshop Item (Speech)
Title:Design Space Exploration Study and Optimization of a Distributed Turbo-Electric Propulsion System for a Regional Passenger Aircraft
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Keller, DennisUNSPECIFIEDhttps://orcid.org/0000-0002-1471-9433UNSPECIFIED
Vechtel, DennisUNSPECIFIEDhttps://orcid.org/0000-0003-1681-7333UNSPECIFIED
Date:17 August 2020
Journal or Publication Title:AIAA Propulsion and Energy Forum and Exposition, 2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:distributed electric propulsion, propeller, aircraft design
Event Title:AIAA Propulsion and Energy 2020 Forum
Event Location:VIRTUAL EVENT
Event Type:international Conference
Event Start Date:24 August 2020
Event End Date:28 August 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old), L - Concepts and Integration (old)
Location: Braunschweig , Hamburg
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Institute of System Architectures in Aeronautics > Aircraft Design and System Integration
Institute of Flight Systems
Deposited By: Keller, Dennis
Deposited On:18 Nov 2020 07:40
Last Modified:24 Apr 2024 20:39

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