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Characterization of Off-Surface Separation Caused by Adverse Pressure Gradient in a Turbulent Wake

Burnazzi, Marco and Knopp, Tobias and Strelets, Mikhail and Shur, Michael and Travin, Andrej and Breitenstein, Wiebke and Scholz, Peter and Radespiel, Rolf (2018) Characterization of Off-Surface Separation Caused by Adverse Pressure Gradient in a Turbulent Wake. In: 21th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics. 21. STAB/DGLR Symposium 2018, 6.-8. Nov. 2018, Darmstadt, Deutschland.

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Official URL: https://www.sla.tu-darmstadt.de/stab_2018/stab2018_home.de.jsp

Abstract

The present contribution focuses on the behavior of two RANS Reynolds stress turbulence models in the prediction of off-surface separation occurring in turbulent wakes subjected to strong adverse pressure gradients. RANS results are compared to a high-fidelity RANS-IDDES solution for an experimental set-up from Driver and Mateer. The tested models are the JHh-v2 and the SSG/LRR. Additionally, the comparison includes a modified version of the SSG/LRR model where the sensitivity to pressure gradients is enhanced by the S-eps-4 term, which is already present in the JHh model. None of these RANS approaches was able to capture the off-surface recirculation as shown by the IDDES. The analysis aims at characterizing the wake flow and identifying possible sources of the RANS shortcomings, such as departure from dynamic equilibrium and strong Reynolds stress anisotropy

Item URL in elib:https://elib.dlr.de/122900/
Document Type:Conference or Workshop Item (Speech)
Title:Characterization of Off-Surface Separation Caused by Adverse Pressure Gradient in a Turbulent Wake
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Burnazzi, MarcoMarco.Burnazzi (at) dlr.deUNSPECIFIED
Knopp, Tobiastobias.knopp (at) dlr.deUNSPECIFIED
Strelets, Mikhailstrelets (at) mail.rcom.ruUNSPECIFIED
Shur, MichaelSaint Petersburg Polytechnic University and New Technologies & Services, LLCUNSPECIFIED
Travin, AndrejSt.-Petersburg Polytechnic University and “New Technologies and Services” (NTS), St.-Petersburg, RussiaUNSPECIFIED
Breitenstein, WiebkeTechnische Universität BraunschweigUNSPECIFIED
Scholz, PeterTU BraunschweigUNSPECIFIED
Radespiel, RolfTU BraunschweigUNSPECIFIED
Date:7 November 2018
Journal or Publication Title:21th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:RANS, Turbulent Wake, APG.
Event Title:21. STAB/DGLR Symposium 2018
Event Location:Darmstadt, Deutschland
Event Type:national Conference
Event Dates:6.-8. Nov. 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
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, GO
Deposited By: Burnazzi, Marco
Deposited On:21 Nov 2018 14:41
Last Modified:31 Jul 2019 20:20

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