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Multi-objective shape optimization of aircraft cabin ventilation components using adjoint CFD

Köthe, Thomas and Herzog, Sebastian and Wagner, Claus (2015) Multi-objective shape optimization of aircraft cabin ventilation components using adjoint CFD. AIAA AVIATION - 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 22. - 26. June 2015, Dallas, TX, USA. doi: 10.2514/6.2015-3239.

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2015-3239


The design of the air distribution systems in aircraft, trains and cars still relies on the experience of the engineers and on extensive testing. However, the performance of these air distribution systems can be improved by applying numerical optimization techniques. In this paper we use adjoint Computational Fluid Mechanics to optimize a cabin outlet of the air distribution system of the Dornier 728 aircraft with the aim to develop a procedure based on which a multi-objective optimization can be performed for the complete air distribution system. With state of the art techniques for multi-objective optimization, like the weighted-sum method, the computational costs are beyond the capabillity when it comes to complex geometries. To avoid these high costs we present an engineering approach which is based on optimized combinations of sensitivity fields obtained with single-objective optimizations in a post-processing step. It is shown that the variation of the scaling factors allows to minimize the objective functions and to approach the utopia point. To be able to systematically vary the scaling factors a multi-objective genetic algorithm is proposed. In the last section the multi-objective problem is reformulated with an epsilon-constraints method and the variation of the scaling factors is optimized with a conjugated gradients optimization method.

Item URL in elib:https://elib.dlr.de/95965/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA 2015-3239
Title:Multi-objective shape optimization of aircraft cabin ventilation components using adjoint CFD
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-13
Series Name:Conference Proceedings online
Keywords:Adjoint methods, sensitivities, shape optimization, multiobjective optimization
Event Title:AIAA AVIATION - 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference
Event Location:Dallas, TX, USA
Event Type:international Conference
Event Dates:22. - 26. June 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Micknaus, Ilka
Deposited On:21 Aug 2015 13:18
Last Modified:14 Dec 2015 10:21

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