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Towards higher aerodynamic efficiency of propeller-driven aircraft with distributed propulsion

Keller, Dennis (2021) Towards higher aerodynamic efficiency of propeller-driven aircraft with distributed propulsion. CEAS Aeronautical Journal, 12 (4), pp. 777-791. Springer. doi: 10.1007/s13272-021-00535-5. ISSN 1869-5590.

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Official URL: https://link.springer.com/article/10.1007/s13272-021-00535-5


The scope of the present paper is to assess the potential of distributed propulsion for a regional aircraft regarding aero-propulsive efficiency. Several sensitivities such as the effect of wingtip propellers, thrust distribution, and shape modifications are investigated based on a configuration with 12 propulsors. Furthermore, an initial assessment of the high-lift performance is undertaken in order to estimate potential wing sizing effects. The performance of the main wing and the propellers are thereby equally considered with the required power being the overall performance indicator. The results indicate that distributed propulsion is not necessarily beneficial regarding the aero-propulsive efficiency in cruise flight. However, the use of wing tip propellers, optimization of the thrust distribution, and wing resizing effects lead to a reduction in required propulsive power by −2.9% to −3.3% compared to a configuration with two propulsors. Adapting the leading edge to the local flow conditions did not show any substantial improvement in cruise configuration to date.

Item URL in elib:https://elib.dlr.de/146965/
Document Type:Article
Title:Towards higher aerodynamic efficiency of propeller-driven aircraft with distributed propulsion
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:17 August 2021
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 777-791
Keywords:Distributed propulsion Aerodynamics Propeller CFD
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Future Engines and Engine Integration
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Keller, Dennis
Deposited On:09 Dec 2021 08:20
Last Modified:09 Dec 2021 08:20

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