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Adjoint-Based, CAD-Free Aerodynamic Shape Optimization of High-Speed Trains

Jakubek, Daria and Wagner, Claus (2016) Adjoint-Based, CAD-Free Aerodynamic Shape Optimization of High-Speed Trains. In: New Results in Numerical and Experimental Fluid Mechanics X Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 132. Springer International Publishing Switzerland 2016. pp. 409-419. doi: 10.1007/978-3-319-27279-5_36. ISBN 978-3-319-27278-8. ISSN 1612-2909.

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Official URL: http://link.springer.com/book/10.1007/978-3-319-27279-5/page/2


Following Othmer’s work on the continuous adjoint formulation for the computation of sensitivities of incompressible, steady-state, ducted flows, we will introduce an iterative, CAD-free, continuous, adjoint-based shape optimization procedure using gaussian filtered sensitivities and mesh morphing with radial basis function interpolation based on the approach described by for the optimization of the front part of the simplified model of a conceptual, generic highspeed train with respect to drag and pressure wave via single- and multi-objective optimization. We will show that, during pressure wave minimization, it was mainly the area with the widest sidewise extension in the bogie section which was affected by the strongest modifications while, on the other hand, for drag optimization the most sensitive areas and significant changes can be found in the front part of the nose tip section. First multi-objective investigations for two-dimensional testcases will show the influence of weighting and morphing parameters on the optimization process involving objective functions for drag and pressure wave.

Item URL in elib:https://elib.dlr.de/93812/
Document Type:Contribution to a Collection
Title:Adjoint-Based, CAD-Free Aerodynamic Shape Optimization of High-Speed Trains
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:January 2016
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics X
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 409-419
EditorsEmailEditor's ORCID iD
Dillmann, AndreasDLR GöttingenUNSPECIFIED
Heller, GerdAirbus Deutschland, Bremen, GermanyUNSPECIFIED
Krämer, EwaldUNI StuttgartUNSPECIFIED
Wagner, ClausDLR GöttingenUNSPECIFIED
Breitsamter, ChristianTU MünchenUNSPECIFIED
Publisher:Springer International Publishing Switzerland 2016
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Keywords:CFD, adjoint shape optimization, mesh morphing, high-speed trains
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 , Stuttgart
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Bachmann, Barbara
Deposited On:07 Jul 2016 14:00
Last Modified:27 Jan 2021 11:47

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