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Hybrid RANS/LES of an isolated engine nacelle with side wind using an unstructured CFD solver

Burnazzi, Marco and Probst, Axel and Steger, Mathias (2019) Hybrid RANS/LES of an isolated engine nacelle with side wind using an unstructured CFD solver. In: Progress in Hybrid RANS-LES Modelling, 143, pp. 347-356. Springer International Publishing. 7th Symposium on Hybrid RANS-LES Methods, 17.-19. Sep. 2018, Berlin, Deutschland. DOI: 10.1007/978-3-030-27607-2_28 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_28


The present work focuses on the scale-resolving numerical simulation of an isolated jet-engine intake in presence of side wind. The computation was carried out with the DLR TAU code within the framework of the Rolls-Royce funded project FaNcI (Fan-Nacelle Integration) and relied on advanced numerical techniques recently developed as part of the DLR project VicToria (Virtual Aircraft Technology Integration Platform). The goal of the present work was the simulation of the intake flow in off-design condition with high crosswind: a partially separated flow where the flow reattachment takes place in the proximity of the hypothetical fan location. A hybrid RANS/LES method based on the Improved Delayed Detached-Eddy Simulation (IDDES) was combined with the low-dispersion low-dissipation numerical scheme (LD2). In particular, a hybrid formulation of the LD2 scheme ensured robustness also in regions of complex grid topologies and flow phenomena involving strong gradients. The result validation is based on experimental measurements of the flow distortion inside the engine inlet. From the final picture the need for scale-resolving turbulence simulation and the advantage of a specific numerical scheme clearly emerge.

Item URL in elib:https://elib.dlr.de/119628/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Print ISBN 978-3-030-27606-5 Online ISBN 978-3-030-27607-2
Title:Hybrid RANS/LES of an isolated engine nacelle with side wind using an unstructured CFD solver
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Probst, AxelAxel.Probst (at) dlr.deUNSPECIFIED
Steger, Mathiasmathias.steger (at) rolls-royce.comUNSPECIFIED
Date:2 November 2019
Journal or Publication Title:Progress in Hybrid RANS-LES Modelling
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/978-3-030-27607-2_28
Page Range:pp. 347-356
Hoarau, YannickUNSPECIFIED
Schwamborn, DieterUNSPECIFIED
Revell, Alistair J.UNSPECIFIED
Mockett, CharlesUNSPECIFIED
Publisher:Springer International Publishing
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Keywords:CFD, Hybrid RANS-LES, Engine Nacelle, Turbulence modeling
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 - VicToria
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, GO
Deposited By: Probst, Axel
Deposited On:07 Nov 2018 17:18
Last Modified:11 Dec 2019 18:36

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