Probst, Silvia and Landa, Tim and Knopp, Tobias and Radespiel, Rolf (2019) Hybrid RANS/LES investigation of the interaction of a longitudinal vortex with an inclined airfoil. In: Progress in Hybrid RANS-LES Modelling, 143, pp. 227-236. Springer International Publishing. 7th Symposium on Hybrid RANS-LES Methods, 17.-19. Sep. 2018, Berlin, Deutschland. doi: 10.1007/978-3-030-27607-2_18. ISBN 978-3-030-27606-5. ISSN 1612-2909.
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Official URL: https://doi.org/10.1007/978-3-030-27607-2_18
Abstract
Engine nacelles of modern commercial aircraft are often equipped with small vortex generators (strakes) to avoid early flow separation of the adverse-pressure-gradient boundary layer on the main wing in low-speed flight. In numerical flow simulations, conventional RANS models show a tendency to overly dissipate these free vortices. Therefore, we study an application scenario for hybrid RANS-LES methods to account for longitudinal vortices and their interaction with airfoils, in order to clarify some open questions: the grey-area problem for free vortices and the extension of synthetic turbulence to such large-scale turbulent structures, the influence of mesh design and resolution, as well as the modelling of the RANS and LES regions over the airfoil. Three approaches are compared: Firstly, pure IDDES is employed with its inherent switching mechanism to wall-modelled LES. Secondly, the switching in the IDDES is controlled by algebraic sensors which activate the WM-LES and the injection of synthetic turbulence upstream of the interaction region of the free vortex with the attached boundary layer. Thirdly, the entire boundary layer is treated in RANS mode.
Item URL in elib: | https://elib.dlr.de/119828/ | ||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||
Title: | Hybrid RANS/LES investigation of the interaction of a longitudinal vortex with an inclined airfoil | ||||||||||||||||||
Authors: |
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Date: | 2 November 2019 | ||||||||||||||||||
Journal or Publication Title: | Progress in Hybrid RANS-LES Modelling | ||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||
Open Access: | No | ||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||
Volume: | 143 | ||||||||||||||||||
DOI : | 10.1007/978-3-030-27607-2_18 | ||||||||||||||||||
Page Range: | pp. 227-236 | ||||||||||||||||||
Editors: |
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Publisher: | Springer International Publishing | ||||||||||||||||||
Series Name: | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | ||||||||||||||||||
ISSN: | 1612-2909 | ||||||||||||||||||
ISBN: | 978-3-030-27606-5 | ||||||||||||||||||
Status: | Published | ||||||||||||||||||
Keywords: | numerische Simulation, Turbulenzmodellierung, hybride RANS/LES, freie Wirbel | ||||||||||||||||||
Event Title: | 7th Symposium on Hybrid RANS-LES Methods | ||||||||||||||||||
Event Location: | Berlin, Deutschland | ||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||
Event Dates: | 17.-19. Sep. 2018 | ||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||||
HGF - Program Themes: | fixed-wing aircraft | ||||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||||
DLR - Program: | L AR - Aircraft Research | ||||||||||||||||||
DLR - Research theme (Project): | L - Simulation and Validation (old) | ||||||||||||||||||
Location: | Göttingen | ||||||||||||||||||
Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > CASE, GO | ||||||||||||||||||
Deposited By: | Probst, Dr. Silvia | ||||||||||||||||||
Deposited On: | 07 Nov 2018 16:30 | ||||||||||||||||||
Last Modified: | 11 Dec 2019 18:20 |
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