engleski

Influence of volume initialization in large eddy simulation of turbulent combustion inside closed vessel

The intensity of turbulent combustion inside the closed vessel is mainly determined by level of turbulence persisting prior to the combustion. The first objective of this work is to introduce new algorithm for turbulence volume initialization within Large Eddy Simulation (LES) framework. The second objective of this work is to capture flame propagation, and consequently pressure-raise function against the experimental results by means of computational fluid dynamics. New algorithm for volume initialization directly employs vortices in a divergence-free way. The approach for turbulence – flame interacion is Coherent Flame Model within Large Eddy Simulation framework (CFMLES). Results are showing that turbulence initialization procedure proposed in this work is able to reconstruct the turbulence field given by the experiment. On the other hand, by proper initialization of turbulence the flame propagation and pressure raise function are improving results significantly.

Turbulent premixed combustion; turbulent flame speed; closed vessel; combustion bomb

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