窄通道中火焰环的三维结构和动力学

doi:10.12066/j.issn.1007-2861.2620

Abstract

Abstract: Flame rings can be considered as premixed flame units with a topology structure similar to flame balls within confined spaces. Numerical methods were employed to investigate the axisymmetric two-dimensional steady-state solutions of flame rings in narrow channels and their response to changes in channel height. The stability of flame rings under radial and three-dimensional small perturbations was examined. Comparative analysis was conducted on the results obtained by using linear approximation assumptions along the channel height direction, and the qualitative reasonableness and effectiveness of the linear approximation assumptions were validated. Meanwhile, from a quantitative perspective, this study reveals the true three-dimensional structure of flame rings and their stability under three-dimensional perturbations, laying a solid foundation for researching and understanding the more complex three-dimensional dynamics of flame rings in the future.

Key words: flame ring, flame ball, narrow channel, flammability limit, stability

CLC Number:

TK121

FAN Miao, LU Zhanbin. Three-dimensional structure and dynamics of flame rings in narrow channels[J]. Journal of Shanghai University（Natural Science Edition）, 2026, 32(1): 108-115.

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Three-dimensional structure and dynamics of flame rings in narrow channels

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