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A Timescale-Augmented Spalart-Allmaras Turbulence Model for Flamelet Combustion Applications

Horchler, Tim and Fechter, Stefan and Karl, Sebastian and Hannemann, Klaus (2019) A Timescale-Augmented Spalart-Allmaras Turbulence Model for Flamelet Combustion Applications. In: 8th European Conference for Aeronauticas and Aerospace Sciences (EUCASS). 8th European Conference for Aeronauticas and Aerospace Sciences (EUCASS), 1. - 4. Juli 2019, Madrid, Spanien.

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Official URL: http://www.eucass2019.eu/papers/

Abstract

Flamelet combustion models cannot be used in combination with one-equation turbulence models, e.g. the classical Spalart-Allmaras model, because they require an explicit value for the turbulent time scale. As this can be avoided for Large-Eddy simulations, Reynolds-averaged Navier-Stokes simulations and Detached-Eddy simulations rely on an explicit transport equation for the turbulent time scale. This work extends the Spalart-Allmaras turbulence model by a transport equation for the specific dissipation rate borrowed from an earlier version of the Wilcox k-omega model. The new model is tested in simulations of a generic 2D test case and two model combustion chambers.

Item URL in elib:https://elib.dlr.de/128332/
Document Type:Conference or Workshop Item (Speech)
Title:A Timescale-Augmented Spalart-Allmaras Turbulence Model for Flamelet Combustion Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Horchler, TimTim.Horchler (at) dlr.deUNSPECIFIED
Fechter, StefanStefan.Fechter (at) dlr.deUNSPECIFIED
Karl, Sebastiansebastian.karl (at) dlr.deUNSPECIFIED
Hannemann, KlausKlaus.Hannemann (at) dlr.deUNSPECIFIED
Date:1 July 2019
Journal or Publication Title:8th European Conference for Aeronauticas and Aerospace Sciences (EUCASS)
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Numerische Simulation, Turbulenzmodellierung, Verbrennung, Raketenbrennkammern, Flamelets, Flamelet-Verbrennungsmodell
Event Title:8th European Conference for Aeronauticas and Aerospace Sciences (EUCASS)
Event Location:Madrid, Spanien
Event Type:international Conference
Event Dates:1. - 4. Juli 2019
Organizer:EUCASS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):Proj TAUROS (TAU for Rocket Thrust Chamber Simulation)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Horchler, Tim
Deposited On:12 Jul 2019 14:50
Last Modified:12 Jul 2019 14:50

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