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Direct Numerical Simulation of the bending effect in turbulent premixed flames

Nivarti, G and Cant, S (2017) Direct Numerical Simulation of the bending effect in turbulent premixed flames. Proceedings of the Combustion Institute, 36. pp. 1903-1910. ISSN 1540-7489

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Direct Numerical Simulation was employed to investigate the bending effect which is the deviation from linearity in high-intensity turbulence in turbulent premixed flame. An initially laminar CH -air premixed flame was subjected to increasing levels of turbulence across five different simulations which maintained all parameters except the turbulence intensity constant. The bending effect was captured within these simulations. Flame Surface Density approach revealed that flame surface area reflects distinctly the variation of turbulent burning velocity with turbulence intensity. The observed bending effect results from a shift in balance under high-intensity turbulence towards mechanisms that favor destruction of flame surface area. These mechanisms tend to preserve the reaction layer ensuring the validity of Damköhler's hypothesis and flamelet models in conditions causing the bending effect observed. 4

Item Type: Article
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 20:05
Last Modified: 15 Apr 2021 06:42
DOI: 10.1016/j.proci.2016.07.076