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/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | The efficient use of CFD in Rotorcraft Optimization | ||||||||||||
Authors: |
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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 (old) | ||||||||||||
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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