Wentrup, Marc and Khier, Walid and Zhang, Qinyin (2014) Drag reduction of a transport helicopter by application of an adjoint-based fuselage optimization chain and modification of the rotor head. Greener Aviation:Clean Sky breakthroughs and worldwide status, 12-14 März 2014, Belgien.
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Official URL: http://www.greener-aviation2014.com/
Abstract
In this paper two approaches are investigated to reduce the parasite drag of a helicopter. The first approach is to optimize the surface of the fuselage back door. This is done by applying an automatic, adjoint-based optimization chain; developed by DLR for these purposes. This optimization chain combines the RANS-solver TAU with a solver for the discrete adjoint equation and a conjugate-gradient based optimization algorithm. The parameterization is done by Free Form Deformation. A description of the functionality of the chain is given, before the results of the optimization run are presented. The resulting surfaces were able to bring benefits, up to 3.75% drag reduction compared to the baseline geometry. The second approach is to reduce the main rotor head drag, by installing a hub fairing. During this investigation, two different hub geometries were tested. By using a fully closed fairing, a drag reduction of about 19% could be achieved.
Item URL in elib: | https://elib.dlr.de/92943/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | Drag reduction of a transport helicopter by application of an adjoint-based fuselage optimization chain and modification of the rotor head | ||||||||||||
Authors: |
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Date: | March 2014 | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | adjoint; optimisation; gradient | ||||||||||||
Event Title: | Greener Aviation:Clean Sky breakthroughs and worldwide status | ||||||||||||
Event Location: | Belgien | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Dates: | 12-14 März 2014 | ||||||||||||
Organizer: | 3AF | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
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 (old) | ||||||||||||
Location: | Braunschweig | ||||||||||||
Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Helicopters | ||||||||||||
Deposited By: | Wentrup, Marc | ||||||||||||
Deposited On: | 03 Dec 2014 14:32 | ||||||||||||
Last Modified: | 31 Jul 2019 19:50 |
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