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Effect of the turbulence modeling in large-eddy simulations of nonpremixed flames undergoing extinction and reignition

Esteban D. Gonzalez-Juez ; Adhiraj Dasgupta ; Salman Arshad (Institutionen för tillämpad mekanik, Förbränning) ; Michael Oevermann (Institutionen för tillämpad mekanik, Förbränning) ; David Lignell
AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting (2017)
[Konferensbidrag, övrigt]

Simulating practical combustion systems requires the approximation of the interaction between turbulence, molecular transport and chemical reactions. Turbulent combustion models are used for this purpose, but their behavior is difficult to anticipate based on their mathematical formulations, making the use of numerical experimentation necessary. Therefore, the present work explores the effect of three turbulent-combustion models, two eddy-viscosity models, and their parameters on a combustion problem which is notoriously difficult to model: flame extinction and reignition. For this purpose, two types of temporal jets are considered, and direct-numerical-simulation results are compared qualitatively with those from large-eddy simulations.

Denna post skapades 2017-06-14.
CPL Pubid: 249798


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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Förbränning (2007-2017)


Subatomär fysik
Acceleratorfysik och instrumentering

Chalmers infrastruktur