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Thermal explosion of a reactive gas mixture at constant pressure for non-uniform and uniform temperature systems
Defence Technology ( IF 5.1 ) Pub Date : 2021-06-16 , DOI: 10.1016/j.dt.2021.06.009
Saad A. El-Sayed

In this study, the approximate and exact solutions for the stationary-state of the solids model with neglecting reactant consumption for both non-uniform and uniform temperature systems were applied on gas ignition under a constant pressure condition. The criticality conditions for a slab, an infinite cylinder, and a sphere are determined and discussed using dimensionless temperatures under constant ambient and surface temperatures for a non-uniform temperature system. Exact solution for a Semenov model with convection heat loss was also presented. The solution of the Semenov problem for constant volume or density as a solid and constant pressure were compared. The critical parameter δ is calculated and compared with those of Frank-Kamenetskii solution values. The validation of the calculated ignition temperatures with other exact solution and experimental results were offered. The relation between critical parameters form Semenov and F.K. models solution was introduced.



中文翻译:

非均匀和均匀温度系统中反应气体混合物在恒压下的热爆炸

在这项研究中,在不均匀和均匀温度系统中,忽略反应物消耗的固体模型静止状态的近似和精确解应用于恒定压力条件下的气体点火。对于非均匀温度系统,在恒定环境和表面温度下使用无量纲温度确定和讨论平板、无限圆柱和球体的临界条件。还提出了具有对流热损失的 Semenov 模型的精确解。比较了固体体积或密度不变和压力不变的 Semenov 问题的解。计算临界参数 δ 并与 Frank-Kamenetskii 解值进行比较。提供了计算的点火温度与其他精确解和实验结果的验证。介绍了Semenov和FK模型解中的关键参数之间的关系。

更新日期:2021-06-16
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