Instability prediction of GO2/GCH4 flames in a single recessed coaxial injector using 1D lumped network model

Bae, Jun Seok; Jo, Hyeontaek; Yoon, Youngbin

doi:10.1007/s12206-022-1037-2

Cited by 2 publications

(1 citation statement)

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“…The instability of the flame will affect the combustion efficiency of the combustion equipment, generate pollutants, and even cause the combustion equipment to flame out in extreme cases (Massa and Freund, 2017). Hence, the periodic and chaotic motions in flame dynamics that can be observed as a result of flame instabilities are of fundamental importance to present combustion science (Sayed-Kassem et al, 2021;Xu et al, 2022;Bae et al, 2022;Manikantachari et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Phenomenon of Flickering Flame Under Different Co-Flow Velocities

Liu¹,

Yang²,

Zhang³

et al. 2023

Front. Heat Mass Transf.

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In this study, numerical investigations are performed on a partially premixed flame of methane and air in two-and three-dimensional models. Nonlinear method is adopted to illustrate the asymmetric phenomenon that affects the flame stability under various co-flow velocities. According to the results, the mathematical relationship between the flame flickering frequency Stanton number and the dimensionless velocity Froude number has been summarized as St=0.7Fr -0.46 . The bifurcation phenomena under different Reynold numbers are found to have significant influence on the system stability. Two critical bifurcation points, which is when Re=300 and Re=1200, are determined as the onset of breaking the flame symmetry and the onset of chaotic state, respectively. The research on flame flicker characteristics provides valuable reference for engineering applications in stable combustion and other related fields.

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