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Linear-Stability-Based Transition Modeling for Aerodynamic Flow Simulations with a Near-Wall Reynolds-Stress Modell

Probst, Axel und Radespiel, Rolf und Rist, U. (2012) Linear-Stability-Based Transition Modeling for Aerodynamic Flow Simulations with a Near-Wall Reynolds-Stress Modell. AIAA Journal, Vol. 50 (2), Seiten 416-428. American Institute of Aeronautics and Astronautics. DOI: 10.2514/1.J051229.

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Offizielle URL: http://www.aiaa.com

Kurzfassung

An extended e^N-based modeling approach for Tollmien–Schlichting-type transition in aerodynamic flow simulations with the low-Re epsilon^h-Reynolds-stress model is presented. Instead of simply activating the turbulence production terms at the transition location (point-transition approach), the method incorporates the otherwise neglected Reynolds-stress contributions by the fluctuations of the Tollmien–Schlichting waves and provides them as local input for the turbulence model at the transition point. The shapes of the Reynolds-stress profiles are derived from linear stability analysis within the e^N method, whereas their absolute magnitudes are calibrated with the aid of direct numerical simulation data of a transitional boundary layer with adverse-pressure gradient. The dissipationrate input is adjusted to theoretically match the amplification rate of the fluctuations but requires a correction to account for the low-Re damping in the epsilon^h-Reynolds-stress model. The paper describes the general modeling ideas and the implementation in the flow solver. Aspects of the numerical discretization and a verification for threedimensional flows are addressed as well. Besides a basic validation for the adverse-pressure-gradient boundary layer, simulations of the SD7003 airfoil flow comprising a laminar separation bubble are presented, which yield very good agreement with measurements. Results of a transitional flat-plate flow are, however, impaired by the lack of intermittency modeling. Finally, the method is applied to a flowthrough nacelle near stall conditions in order to prove its ability to compute consistent transitional behavior in complex three-dimensional flows.

Dokumentart:Zeitschriftenbeitrag
Titel:Linear-Stability-Based Transition Modeling for Aerodynamic Flow Simulations with a Near-Wall Reynolds-Stress Modell
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Probst, AxelTU-Braunschweig
Radespiel, RolfTU Braunschweig
Rist, U.Uni Stuttgart
Datum:2012
Erschienen in:AIAA Journal
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:Vol. 50
DOI :10.2514/1.J051229
Seitenbereich:Seiten 416-428
Verlag:American Institute of Aeronautics and Astronautics
Status:veröffentlicht
Stichwörter:Transition, Reynolds-stress model, Linear-stability theory, SD7003, flow-through nacelle
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation & Validierung
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Hinterlegt von: Ilka Micknaus
Hinterlegt am:04 Mai 2012 10:36
Letzte Änderung:26 Mär 2013 13:38

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