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Multi-Objective Optimizations in Rotor Aerodynamics using Variable Fidelity Simulations

Wilke, Gunther (2013) Multi-Objective Optimizations in Rotor Aerodynamics using Variable Fidelity Simulations. In: 38th European Rotorcraft Forum, 1 (1), pp. 1-13. 38th European Rotorcraft Forum. 39th European Rotorcraft Forum, 03-06 Sep 2013, Moscow, Russia.

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[img] PDF (Presentation) - Only accessible within DLR

Official URL: http://erf2013.org/


This work explains the methodological setup of a variable fidelity framework for the aerodynamic optimization of helicopter rotor blades and demonstrates its capabilities for a single and multi-objective test case. The optimization approach utilizes a Hierarchical Kriging surrogate model. First, a benchmark for single objective optimization containing up to three fidelities demonstrates that the variable fidelity technique significantly reduces the required computational resources, if high fidelity optimizations are necessary. For the hover optimization savings up to 45.0% are achieved and in forward flight optimizations even 83.1%. Extending the framework to multi-objective problems, the usefulness is tested for mid-fidelity optimizations. The resulting Pareto fronts of the single and variable fidelity optimizations are compared to a reference solution. The accuracy of variable fidelity Pareto fronts is generally higher measured by the distance to the reference Pareto front. In the end, three different rotor designs are picked from the Pareto front and the advantages and disadvantages of each rotor are discussed.

Item URL in elib:https://elib.dlr.de/85846/
Document Type:Conference or Workshop Item (Speech)
Title:Multi-Objective Optimizations in Rotor Aerodynamics using Variable Fidelity Simulations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wilke, Gunthergunther.wilke (at) dlr.deUNSPECIFIED
Date:September 2013
Journal or Publication Title:38th European Rotorcraft Forum
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-13
EditorsEmailEditor's ORCID iD
Wilke, Gunthergunther.wilke@dlr.deUNSPECIFIED
Publisher:38th European Rotorcraft Forum
Series Name:38th European Rotorcraft Forum
Keywords:helicopter rotors, variable fidelity, surrogate models, optimization
Event Title:39th European Rotorcraft Forum
Event Location:Moscow, Russia
Event Type:international Conference
Event Dates:03-06 Sep 2013
Organizer:Russian Helicopters
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
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: Wilke, Gunther Andreas
Deposited On:18 Dec 2013 16:34
Last Modified:08 May 2014 23:19

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