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An Adjoint-based Optimization Method for Helicopter Fuselage Backdoor Geometry

Zhang, Qinyin and Lee, Jen-Der and Wendisch, Jan-Hendrik (2010) An Adjoint-based Optimization Method for Helicopter Fuselage Backdoor Geometry. 36th European Rotorcraft Forum 2010, 7.-9. Sep. 2010, Paris, Frankreich.

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Abstract

For utility and transport helicopters with rear loading backdoors, the afterbody area is usually one of the largest drag contributing areas of the fuselage. For this reason, numerical simulations have been performed to assess the possibilities of fuselage drag reduction by the means of local shape modification at the afterbody region. Within this study an automatic optimization chain with gradient-based optimization technique and surface parameterization/deformation tools has been established and applied to the backdoor geometry of a modified GOAHEAD configuration. This paper will present the first numerical results of the ongoing shape optimization studies. As it turns out, local shape modification on the backdoor geometry can lead to a reduction of the separation region there and to a drag reduction of the helicopter fuselage.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:An Adjoint-based Optimization Method for Helicopter Fuselage Backdoor Geometry
Authors:
AuthorsInstitution or Email of Authors
Zhang, Qinyinqinyin.zhang@dlr.de
Lee, Jen-DerUNSPECIFIED
Wendisch, Jan-HendrikUNSPECIFIED
Date:September 2010
Status:Published
Keywords:Aerodynamische Formoptimierung, Reduzierung des Luftwiderstands
Event Title:36th European Rotorcraft Forum 2010
Event Location:Paris, Frankreich
Event Type:international Conference
Event Dates:7.-9. Sep. 2010
Organizer:L'Association Aéronautique et Astronautique de France
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Qinyin Zhang
Deposited On:25 Jan 2011 13:54
Last Modified:25 Jan 2011 13:54

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