Numerical Investigation of the Turbulence Models Effect on the Combustion Characteristics in a Non-Premixed Turbulent Flame Methane-Air

O. Moussa^{1, 2,} and Z. Driss²

¹Higher School of Science and Technology of Hammam Sousse (ESSTHS), Lamine Abassi Street, 4011 H, Sousse, Tunisia

²National School of Engineers of Sfax, University of Sfax, Electromechanical Systems Laboratory, BP 1173, Soukra Road, Sfax, Tunisia

Cite this paper:
O. Moussa and Z. Driss. Numerical Investigation of the Turbulence Models Effect on the Combustion Characteristics in a Non-Premixed Turbulent Flame Methane-Air. American Journal of Energy Research. 2017; 5(3):85-93. doi: 10.12691/ajer-5-3-3

Abstract

A two-dimensional axis-symmetric numerical model was solved to investigate the effect of four turbulence models on combustion characteristics, such as the velocity, the pressure, the turbulent kinetic energy and the dissipation rate in a methane-air no-premixed flame. Based on the commercial CFD code Ansys fluent 17.0, different turbulence models including the standard k-ε model, the RNG k-ε model, the realizable k-ε model and the standard k-ω model were used to simulate the flow field in a simple burner. The eddy dissipation model with the global reaction schema was applied to model the turbulence reaction interaction in the flame region. A finite volume approach was used to solve the Navier-Stokes equations with the combustion model. Particularly, the effect of these turbulence models on the combustion characteristics was analyzed. The numerical predictions were validated by comparison with anterior experimental results. Moreover, the predicted axial and radial gradients of velocity in the standard k-ε are overall agreement with literature results.

Keywords:
diffusion flame methane-air turbulence models CFD finite volume

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