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Improved Turbulence and Transition Closures for Separated Flows

Autor(en): J. Hodara, M.J. Smith
Zusammenfassung: A new turbulence approach is proposed that combines the strengths of Unsteady Reynolds-Averaged Navier-Stokes (URANS) and Large Eddy Simulation (LES) turbulence closure with local dynamic kinetic model (LDKM) and the widely adopted [Formular omitted] transition model. This method has the potential for accurately capturing massively separated boundary layers in the transitional Reynolds number range at a reasonable computational cost, and therefore holds great promise for the rotorcraft industry. Comparisons are evaluated on several cases, including a transitional flat plate, circular cylinder in crossflow and NACA 63-415 wing. Cost and accuracy correlations with URANS and prior hybrid URANS-LES approaches with and without transition modeling indicate that this new method can capture both separation and transition more accurately and cost effectively.
Veranstaltung: 41th European Rotorcraft Forum 2015
Medientyp: Conference Paper
Sprache: englisch
Veröffentlicht: DGLR-Bericht, 2016, 2016-01, 41st European Rotorcraft Forum 2015; S.-; 2016; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn
Preis: NA
Stichworte zum Inhalt: average;boundary layers;circular cylinders;correlation;costs;cross flow;dynamic models;flat plates;industries;large eddy simulation;Navier-Stokes equation;Reynolds averaging;Reynolds equation;Reynolds number;rotary wing aircraft;turbulence;wings
Verfügbarkeit: Bestellbar
Veröffentlicht: 2016

Dieses Dokument ist Teil einer übergeordneten Publikation:
41st European Rotorcraft Forum 2015