Flow, Turbulence and Combustion

, Volume 84, Issue 3, pp 339–356 | Cite as

Statistically Steady Incompressible DNS to Validate a New Correlation for Turbulent Burning Velocity in Turbulent Premixed Combustion

Article

Abstract

Incompressible 3-D DNS is performed in non-decaying turbulence with single step chemistry to validate a new analytical expression for turbulent burning velocity. The proposed expression is given as a sum of laminar and turbulent contributions, the latter of which is given as a product of turbulent diffusivity in unburned gas and inverse scale of wrinkling at the leading edge. The bending behavior of UT at higher u′ was successfully reproduced by the proposed expression. It is due to decrease in the inverse scale of wrinkling at the leading edge, which is related with an asymmetric profile of FSD with increasing u′. Good agreement is achieved between the analytical expression and the turbulent burning velocities from DNS throughout the wrinkled, corrugated and thin reaction zone regimes. Results show consistent behavior with most experimental correlations in literature including those by Bradley et al. (Philos Trans R Soc Lond A 338:359–387, 1992), Peters (J Fluid Mech 384:107–132, 1999) and Lipatnikov et al. (Progr Energ Combust Sci 28:1–74, 2002).

Keywords

Turbulent burning velocity Premixed turbulent combustion Zone conditional Flame surface density Direct numerical simulation 

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© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Combustion Laboratory, Department of Mechanical EngineeringPohang University of Science and TechnologyPohangRepublic of Korea

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