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含能材料  2015 

镁金属微粒非快速燃烧反应模型及数值分析

DOI: 10.11943/j.issn.1006-9941.2015.06.013

Keywords: 镁颗粒 燃烧模型 非快速反应速率

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Abstract:

为深入研究镁金属微粒的燃烧特性, 基于Arrhenius定律, 建立了镁颗粒非快速反应速率的一维球对称准稳态燃烧模型。模拟了直径为120 mm的镁颗粒在大气环境中的燃烧过程。获得了燃烧场温度、反应物组分分布以及颗粒燃烧反应时间。结果表明:采用非快速燃烧反应模型计算得到的反应区最高温度为3568 K, 镁颗粒完全燃烧时间为21.9 ms。这与文献实验值吻合较好。反应物组分氧气和镁蒸气可扩散到反应区外部, 与镁颗粒燃烧中止实验后观察到的氧原子存在于未燃镁金属中的现象定性吻合, 表明所建立的非快速燃烧反应模型比传统快速反应燃烧模型更能够准确描述镁微粒燃烧的实际工况

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