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Preliminary Structural Design of a High Aspect Ratio Transport Aircraft With Laminar Wing

Ritter, Markus Raimund und Fehrs, Michael und Schmalz, Martin (2024) Preliminary Structural Design of a High Aspect Ratio Transport Aircraft With Laminar Wing. In: 34th Congress of the International Council of the Aeronautical Sciences, ICAS 2024. ICAS2024 - 34th Congress of the International Council of the Aeronautical Sciences, 2024-09-09 - 2024-09-12, Florenz, Italien.

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Kurzfassung

A high aspect ratio jet transport aircraft with a laminar wing is designed within the project ULTIMATE funded by the German Federal Aeronautical Research Programme. The design of the wing features both a high aspect ratio (> 15) as well as a laminar airfoil layout with natural laminar flow (NLF) realized by a particular leading edge shape to obtain Crossflow Attenuated Natural Laminar Flow (CATNLF) in the inner region of the wing. A particular challenge is the structural design and optimization of this wing due to the impact of static and dynamic aerodynamic and aeroelastic effects, which must be considered throughout the whole design process. In this work we present an approach for the generation and assessment of the structural model based on aeroelastic models of mixed fidelity (potential aerodynamics as well as CFD) which are derived from a prescribed aerodynamic (flight) shape of the wing. For the structural optimization of the wing, load cases requested by the CS-25 specifications (including steady and quasi-steady maneuver as well as gust loads) are considered and five different mass cases, ranging from empty to maximum take-off mass are used. Steady CFD RANS simulations with free transition modeling are performed for cruise flight conditions to assess the impact of elastic structural deformations caused by different fuel or payload fractions on the performance of the laminar wing. The results reveal that the laminar wing is very robust against elastic structural deformations during cruise flight for the mass cases considered.

elib-URL des Eintrags:https://elib.dlr.de/206487/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Preliminary Structural Design of a High Aspect Ratio Transport Aircraft With Laminar Wing
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Ritter, Markus RaimundMarkus.Ritter (at) dlr.dehttps://orcid.org/0000-0003-3828-0397NICHT SPEZIFIZIERT
Fehrs, MichaelMichael.Fehrs (at) dlr.dehttps://orcid.org/0000-0002-8137-9758NICHT SPEZIFIZIERT
Schmalz, MartinMartin.Schmalz (at) dlr.dehttps://orcid.org/0000-0002-5627-5316NICHT SPEZIFIZIERT
Datum:12 September 2024
Erschienen in:34th Congress of the International Council of the Aeronautical Sciences, ICAS 2024
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:High Aspect Ratio Wing, HARW, Natural Laminar Flow, CATNLF, DLR F25, ULTIMATE
Veranstaltungstitel:ICAS2024 - 34th Congress of the International Council of the Aeronautical Sciences
Veranstaltungsort:Florenz, Italien
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:9 September 2024
Veranstaltungsende:12 September 2024
Veranstalter :International Council of the Aeronautical Sciences
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Effizientes Luftfahrzeug
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L EV - Effizientes Luftfahrzeug
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Flugzeug und Validierung
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Lastanalyse und Entwurf
Institut für Aeroelastik > Aeroelastische Simulation
Hinterlegt von: Ritter, Markus Raimund
Hinterlegt am:18 Sep 2024 11:45
Letzte Änderung:18 Sep 2024 11:45

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