DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Modification of the SSG/LRR-Omega Model for Turbulent Boundary Layer Flows in an Adverse Pressure Gradient

Knopp, Tobias and Reuther, Nico and Novara, Matteo and Schanz, Daniel and Schülein, Erich and Schröder, Andreas and Kähler, Christian (2023) Modification of the SSG/LRR-Omega Model for Turbulent Boundary Layer Flows in an Adverse Pressure Gradient. Flow Turbulence and Combustion, 111, pp. 409-438. Springer. doi: 10.1007/s10494-023-00457-8. ISSN 1386-6184.

[img] PDF - Published version

Official URL: https://link.springer.com/article/10.1007/s10494-023-00457-8


A modification of the RANS turbulence model SSG/LRR-omega for turbulent boundary layers in an adverse pressure gradient is presented. The modification is based on a wall law for the mean velocity, in which the log law is progressively eroded in an adverse pressure gradient and an extended wall law (designated loosely as a half-power law) emerges above the log law. An augmentation term for the half-power law region is derived from the analysis of the boundary-layer equation for the specific rate of dissipation omega. An extended data structure within the RANS solver provides, for each viscous wall point, the field points on a wall normal line. This enables the evaluation of characteristic boundary layer parameters for the local activation of the augmentation term. The modification is calibrated using a joint DLR/UniBw turbulent boundary layer experiment. The modified model yields an improved predictive accuracy for flow separation. Finally, the applicability of the modified model to a 3D wing-body configuration is demonstrated.

Item URL in elib:https://elib.dlr.de/196215/
Document Type:Article
Title:Modification of the SSG/LRR-Omega Model for Turbulent Boundary Layer Flows in an Adverse Pressure Gradient
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Knopp, TobiasUNSPECIFIEDhttps://orcid.org/0000-0002-3161-5353UNSPECIFIED
Novara, MatteoUNSPECIFIEDhttps://orcid.org/0000-0002-8975-0419UNSPECIFIED
Schanz, DanielUNSPECIFIEDhttps://orcid.org/0000-0003-1400-4224UNSPECIFIED
Schülein, ErichUNSPECIFIEDhttps://orcid.org/0000-0002-1125-8504UNSPECIFIED
Schröder, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-6971-9262140139734
Kähler, ChristianUniversität der Bundeswehr, Münchenhttps://orcid.org/0000-0001-9336-2091UNSPECIFIED
Date:July 2023
Journal or Publication Title:Flow Turbulence and Combustion
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 409-438
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:SSG/LRR-omega; RSM; adverse pressure gradient; RANS; turbulent boundary layer
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Digital Technologies
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, GO
Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Institute for Aerodynamics and Flow Technology > High Speed Configurations, GO
Deposited By: Knopp, Dr.rer.nat. Tobias
Deposited On:09 Aug 2023 10:48
Last Modified:11 Aug 2023 10:05

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.