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Hybrid RANS/LES of an isolated engine nacelle with side wind using the DLR TAU code

Burnazzi, Marco and Probst, Axel and Steger, Mathias (2018) Hybrid RANS/LES of an isolated engine nacelle with side wind using the DLR TAU code. Deutscher Luft- und Raumfahrtkongress 2018, 04.-06. Sep. 2018, Friedrichshafen, Deutschland.

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Official URL: https://dlrk2018.dglr.de/

Abstract

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/119589/
Document Type:Conference or Workshop Item (Speech)
Title:Hybrid RANS/LES of an isolated engine nacelle with side wind using the DLR TAU code
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Burnazzi, MarcoMarco.Burnazzi (at) dlr.deUNSPECIFIED
Probst, Axelaxel.probst (at) dlr.deUNSPECIFIED
Steger, MathiasRolls-Royce DeutschlandUNSPECIFIED
Date:2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CFD, Hybrid RANS/LES, Engine Intake, Turbulence Modeling
Event Title:Deutscher Luft- und Raumfahrtkongress 2018
Event Location:Friedrichshafen, Deutschland
Event Type:national Conference
Event Dates:04.-06. 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 17:04
Last Modified:11 Dec 2019 18:00

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