elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Efficient polar optimization of transport aircraft in transonic RANS flow using adjoint gradient based approach

Ilic, Caslav und Widhalm, Markus und Brezillon, Joel (2012) Efficient polar optimization of transport aircraft in transonic RANS flow using adjoint gradient based approach. ECCOMAS 2012 (6th European congress on computational methods in applied sciences and engineering), September 10-14, 2012, Vienna.

[img]
Vorschau
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
610kB

Kurzfassung

A major design requirement for transport aircraft is efficient cruise flight in the transonic region. From the aerodynamic viewpoint, this is achieved by favorable lift-to-drag ratio of the aircraft, both at the main design point and at off-design conditions. We therefore present a method to efficiently perform a multi-point optimization of a representative wing-body configuration. Designs are evaluated with RANS CFD simulations, the wing is parametrized using 40 free-form deformation control points, and a gradient-based method is used to drive the optimization. The gradient of cost functions is computed with a discrete adjoint approach, in which flow and mesh adjoint equations are solved. Compared to single-point optimization, with multi-point optimization we obtain a design with slightly lower best lift-to-drag ratio, but which has improved lift-to-drag polar over the whole range of practical lift coefficients compared to the baseline design.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Efficient polar optimization of transport aircraft in transonic RANS flow using adjoint gradient based approach
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Ilic, Caslavcaslav.ilic@dlr.de
Widhalm, MarkusNICHT SPEZIFIZIERT
Brezillon, JoelNICHT SPEZIFIZIERT
Datum:September 2012
Referierte Publikation:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:aircraft, optimization, gradient, adjoint, multi-point, polar
Veranstaltungstitel:ECCOMAS 2012 (6th European congress on computational methods in applied sciences and engineering)
Veranstaltungsort:Vienna
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:September 10-14, 2012
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Flugphysik
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Transportflugzeuge
Institut für Aerodynamik und Strömungstechnik
Institut für Aerodynamik und Strömungstechnik > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Hinterlegt von: Caslav Ilic
Hinterlegt am:04 Dez 2012 14:58
Letzte Änderung:12 Dez 2013 21:53

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.