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Aerodynamic Analysis and Optimization of a Coaxial Helicopter Fuselage

Rottmann, Lukas (2021) Aerodynamic Analysis and Optimization of a Coaxial Helicopter Fuselage. In: 22nd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics XIII (151), pp. 397-406. Springer International Publishing. STAB 2020 - 22. DGLR-Fachsymposium der STAB, Göttingen, Germany. doi: 10.1007/978-3-030-79561-0_38. ISBN 978-3-030-79560-3. ISSN 1612-2909.

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Official URL: https://www.dlr.de/as/Portaldata/5/Resources/dokumente/veranstaltungen/stab_workshop/STAB-Jahresbericht-2020.pdf


The flight dynamics and flight envelope of coaxial ultralight helicopter CoAX 2D were investigated. For this purpose, series of flight tests was carried out. This paper presents the computation of the fuselage aerodynamics of the CoAX 2D with the DLR flow solver TAU. For cruise flight, fuselage polars with different angles of attack and yaw angles without rotor downwash were calculated. Furthermore, different airspeeds, climb and sink rates were simulated in combination with rotor downwash. To simulate the rotor downwash from the coaxial rotors, the Actuator Disc approach is used. The lift of the horizontal stabilizer is compared between flight test and simulations for validation purposes. The lift was determined in the flight test by deflection of the tail boom. Finally, concepts for the optimization of the fuselage were developed. The landing gear was selected as a possible optimization potential. The changes from an aerodynamic point of view related to the shape of the skid supports. The aerodynamics of the new landing gear were compared with the old configuration and a reduction of drag could be shown.

Item URL in elib:https://elib.dlr.de/193487/
Document Type:Conference or Workshop Item (Other)
Additional Information:Weder Präsenz- noch Online-Veranstaltung auf Grund der Corona-Pandemie
Title:Aerodynamic Analysis and Optimization of a Coaxial Helicopter Fuselage
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:14 July 2021
Journal or Publication Title:22nd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics XIII
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 397-406
Publisher:Springer International Publishing
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Keywords:Coaxial ultralight helicopter Actuator Disc CoAX 2D Helicopter fuselage aerodynamics TAU
Event Title:STAB 2020 - 22. DGLR-Fachsymposium der STAB
Event Location:Göttingen, Germany
Event Type:national Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Rotorcraft and Validation
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Deposited By: Rottmann, Lukas
Deposited On:10 Feb 2023 12:16
Last Modified:13 Feb 2023 07:57

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