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The efficient use of CFD in Rotorcraft Optimization

Schwarz, Thorsten and Wentrup, Marc and Wilke, Gunther Andreas (2017) The efficient use of CFD in Rotorcraft Optimization. AIAA SciTech Forum 2017, 9.-13. Jan. 2017, Grapevine, Texas, USA.

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Abstract

Computational Fluid Dynamics enables the accurate prediction of the flow about complete rotorcraft configurations. However, depending on the complexity of test case under consideration the execution time of a single CFD computation may be prohibitive. Therefore, efficient optimization strategies are required. Two examples of recent optimizations by DLR are reported: A first example is given by the optimization of a helicopter fuselage to minimize drag. The adjoint equations are solved to efficiently compute the design sensitivities for up to 200 design variables and to find the optimum with a gradient based optimizer. A second example is given by the multi-objective optimization of a helicopter rotor blade using ten design variables. The Pareto-front for the goal functions hover and forward flight performance is predicted by surrogate based optimization. A variable-fidelity approach combining low- and high fidelity predictions is employed to reduce the number of required high-fidelity samples.

Item URL in elib:https://elib.dlr.de/111206/
Document Type:Conference or Workshop Item (Speech)
Title:The efficient use of CFD in Rotorcraft Optimization
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwarz, ThorstenThorsten.Schwarz (at) dlr.dehttps://orcid.org/0000-0003-1034-6120
Wentrup, Marcmarc.wentrup (at) dlr.deUNSPECIFIED
Wilke, Gunther AndreasGunther.Wilke (at) dlr.deUNSPECIFIED
Date:12 January 2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CFD, optimization, adjoint, surrogate model, helicopter, rotorcraft
Event Title:AIAA SciTech Forum 2017
Event Location:Grapevine, Texas, USA
Event Type:international Conference
Event Dates:9.-13. Jan. 2017
Organizer:AIAA
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: Schwarz, Dr.-Ing. Thorsten
Deposited On:24 Feb 2017 09:20
Last Modified:24 Feb 2017 09:20

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