elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

AN ADJOINT BASED OPTIMIZATION CHAIN FOR COMPLEX HELICOPTER FUSELAGE PARTS USING A FREE FORM DEFORMATION OR CAD BASED PARAMETERIZATION METHOD

Wentrup, Marc (2015) AN ADJOINT BASED OPTIMIZATION CHAIN FOR COMPLEX HELICOPTER FUSELAGE PARTS USING A FREE FORM DEFORMATION OR CAD BASED PARAMETERIZATION METHOD. 41st European Rotorcraft Forum, 1-4 Sep. 2015, Munich, Germany.

[img] PDF - Registered users only
4MB

Official URL: http://erf2015.dglr.de/

Abstract

In this paper a gradient based optimization chain for aerodynamic shape optimization is described. The chain includes the DLR TAU-code for flow evaluations, while a discrete adjoint approach is used to compute the gradient of a high count of design variables. For parameterization of complex helicopter fuselage parts, two different methods were implemented. The first method uses the Free Form Deformation technique to modify the shape by manipulating the control points of a NURBS-volume. The second approach is to use the CAD software CATIA V5 to build up a parametrical model for optimization. To investigate both methods with different settings, the ROBIN-mod7 fuselage was chosen to reduce drag by optimizing the relative simple back door geometry. After gaining experience with this example, the optimization chain is used to optimize the shape of the common helicopter platform sponsons in the scope of the European Clean Sky GRC2-project. It could be shown that for both examples a reduction of the drag force was achieved (drag reduction of 21.76% for the ROBIN-mod7 test case and 1.49% drag reduction for the sponsons optimization).

Item URL in elib:https://elib.dlr.de/100414/
Document Type:Conference or Workshop Item (Speech)
Title:AN ADJOINT BASED OPTIMIZATION CHAIN FOR COMPLEX HELICOPTER FUSELAGE PARTS USING A FREE FORM DEFORMATION OR CAD BASED PARAMETERIZATION METHOD
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wentrup, Marcmarc.wentrup (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:ADJOINT, OPTIMIZATION, FREE FORM DEFORMATION, CAD BASED OPTIMIZATION
Event Title:41st European Rotorcraft Forum
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:1-4 Sep. 2015
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
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Wentrup, Marc
Deposited On:09 Dec 2015 13:34
Last Modified:09 Dec 2015 13:34

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.