Abstract

Four detailed chemical mechanisms used to describe detonation combustion of hydrogen in oxygen are considered. Ignition delays for various temperatures and pressures are found, the Chapman–Jouguet velocity is determined, and the Zel’dovich–von Neumann–Döring solution for different models is obtained. The effect of dilution of the stoichiometric mixture of hydrogen and oxygen by an inert gas is estimated. Direct numerical simulation of detonation wave propagation in a channel is performed. The emergence of instability of the plane wave and formation of a cellular (multifront) structure are studied. The results predicted by different chemical models are analyzed and compared with each other and with available experimental data.

中文翻译：

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爆轰数值模拟中氢气燃烧的详细化学模型的比较

摘要

考虑了用于描述氢气在氧气中的爆轰燃烧的四种详细化学机制。找到了不同温度和压力下的点火延迟，确定了查普曼-朱盖速度，并获得了不同模型的 Zel'dovich-von Neumann-Döring 解。估计由惰性气体稀释氢气和氧气的化学计量混合物的影响。对通道中的爆震波传播进行直接数值模拟。研究了平面波不稳定的出现和细胞（多前）结构的形成。对不同化学模型预测的结果进行分析并相互比较，并与可用的实验数据进行比较。