In this paper, the cellular structure of a spherical expanding hydrogen-air flame with a hydrogen concentration of 10% by volume was investigated. Based on experimentally obtained shadow photographs, the dependences of the flame front radius on the angle for each moment of time were plotted. Using discrete Fourier transform, time dependences of the flame front cell amplitude are obtained. The criterion of splitting and formation of a new cascade of cells is formulated.
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Dentsel et al. (2024) studied this question.
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