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Validation of RANS turbulence models for subsonic turbulent boundary layer flows under families of pressure gradients

Nishi, Yasunari and Knopp, Tobias and Ströer, Philip and Krumbein, Andreas and Willert, Christian (2021) Validation of RANS turbulence models for subsonic turbulent boundary layer flows under families of pressure gradients. In: 20. STAB-Workshop - Jahresbericht 2021, pp. 43-44. 20. STAB-Workshop 2021, 16.-17.11.2021, Göttingen, Deutschland.

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Official URL: https://www.dlr.de/as/Portaldata/5/Resources/dokumente/veranstaltungen/stab_workshop/STAB-Jahresbericht-2021.pdf

Abstract

The behavior of turbulent boundary layer (TBL) flows subjected to adverse-pressure gradients (APG) at high Reynolds numbers has not yet been fully understood, despite its great importance for many practical engineering applications. In particular, the effects of pressure gradients on the mean velocity profiles are still under debate, e.g., existence of log-law and half-power-law (sqrt-law), history effects, or non-equilibrium effects. At the same time, the predictive accuracy of the existing Reynolds averaged Navier-Stokes (RANS) turbulence models for such flows is also questionable because these models are mainly calibrated for simple canonical flows including a flat-plate TBL at a zeropressure gradient (ZPG). Therefore, the validation of RANS models for well-defined TBL flow experiments at APG is a crucial task to ensure reliable predictions and to obtain insights into further model improvements. However, such validations are still rare in the literature due to the lack of carefully designed experiments that are intended to be used as test cases for computational fluid dynamics (CFD).

Item URL in elib:https://elib.dlr.de/145896/
Document Type:Conference or Workshop Item (Speech)
Title:Validation of RANS turbulence models for subsonic turbulent boundary layer flows under families of pressure gradients
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Nishi, YasunariDLR AS CASUNSPECIFIED
Knopp, Tobiastobias.knopp (at) dlr.dehttps://orcid.org/0000-0002-3161-5353
Ströer, PhilipPhilip.Stroeer (at) dlr.deUNSPECIFIED
Krumbein, AndreasAndreas.Krumbein (at) dlr.dehttps://orcid.org/0000-0002-2772-7328
Willert, ChristianChris.Willert (at) dlr.dehttps://orcid.org/0000-0002-1668-0181
Date:17 November 2021
Journal or Publication Title:20. STAB-Workshop - Jahresbericht 2021
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 43-44
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDSTABUNSPECIFIED
Series Name:Jahresbericht
Status:Published
Keywords:Turbulent boundary layer; Adverse pressure gradient; RANS turbulence modelling
Event Title:20. STAB-Workshop 2021
Event Location:Göttingen, Deutschland
Event Type:Workshop
Event Dates:16.-17.11.2021
Organizer:STAB
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 , Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, GO
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Knopp, Dr.rer.nat. Tobias
Deposited On:05 Jan 2022 14:00
Last Modified:05 Jan 2022 14:00

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