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- W4286750043 abstract "A computational investigation was carried out to assess the effects of highly energetic vortices on the local structure of laminar premixed flames . The study involved a lean atmospheric methane-air flame interacting with vortex sizes ranging from five times to half of the laminar flame thickness. The characteristic velocities of the vortices were chosen to correspond to extreme turbulence intensities . Vortices smaller than the flame thickness were found to have a minimal effect on the flame structure due to the high rate of dissipation. Vortices with sizes greater than or equal to the flame thickness were found to induce flame siphoning and/or product-side local flame annihilation and as a result transport considerable amounts of formaldehyde and thermal energy to the unburned side thereby modifying the state of the reactants. The results of the present study for high activation energy reacting flows raise questions regarding the general validity of: (1) conjectured mechanisms of the so-called flame broadening under intense turbulence conditions; and (2) qualitative arguments regarding sub-flame-thickness vortex effects on the preheat zone in the context of the Borghi–Peters regime diagram, as originally postulated by Damköhler." @default.
- W4286750043 created "2022-07-23" @default.
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- W4286750043 date "2022-11-01" @default.
- W4286750043 modified "2023-10-17" @default.
- W4286750043 title "Local effects in vortex-flame interactions: Implications for turbulent premixed flame scaling and observables" @default.
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- W4286750043 doi "https://doi.org/10.1016/j.combustflame.2022.112293" @default.
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