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High-Fidelity Optimization Framework for Helicopter Rotors

Imiela, Manfred (2009) High-Fidelity Optimization Framework for Helicopter Rotors. ODAS 2009 - 10th ONERA-DLR Aerospace Symposium, 6.-8. Oct. 2009, Berlin, Germany.

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Abstract

An optimization framework for helicopter rotors based on high-fidelity coupled CFD/CSM analyses is presented. For this purpose the optimization software DAKOTA has been linked to a parametric geometry unit, a mesh generation unit and a fluid-structure module which consists of the DLR flow solver FLOWer coupled with the Comprehensive Rotorcraft Code HOST from Eurocopter. The optimization framework is first applied to various optimization problems in hover starting with the easy task of optimizing the twist rate for the 7A model rotor. The complexity of the optimizations is increased step by step and finishes with an optimization case involving all seven design parameters showing its superiority over simpler optimization problems with respect to the achieved improvement. In the next step the framework is operated in forward flight condition also for the optimization of the twist rate. Small improvements with respect to the 7A rotor are made though indicating the conflicting nature of hover and forward flight requirements. Thus a multi-objective optimization for the twist of the 7A rotor is carried out.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:High-Fidelity Optimization Framework for Helicopter Rotors
Authors:
AuthorsInstitution or Email of Authors
Imiela, Manfredmanfred.imiela@dlr.de
Date:October 2009
Status:Published
Keywords:Optimization, Fluid-Structure-Interaction, Multi-Objective, Hover, Forward Flight, Rotor, CFD, CSM, DAKOTA
Event Title:ODAS 2009 - 10th ONERA-DLR Aerospace Symposium
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:6.-8. Oct. 2009
Organizer:DLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft, Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research, L AR - Aircraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft, L - The Innovative Rotorcraft, L - Flexible Aircraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Configuration Design
Deposited By: Manfred Imiela
Deposited On:05 Jan 2011 15:24
Last Modified:12 Dec 2013 21:11

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