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H_2-O_2混气系着火“半岛”现象的数值验证

Numerical Examination of Ignition “Peninsula” Phenomenon in Closed H_2-O_2 Mixing Gas System
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摘要 基于链锁分支爆炸理论 ,研究封闭空间H2 O2 化学计量混气系的着火现象·建立由自由基基元反应动力学关系、反应速率定律和能量守恒定律决定的过程数学描述 ,用Gear算法求解具有“刚性”特征的常微分方程组·计算得到包括对过程起决定作用的自由基中间物种和反应生成物浓度以及系统温度的变化规律 ,在P T坐标面上扫描获得了与经典实验结果完全一致的着火界限曲线·针对传统热力理论的缺陷 ,对着火界限曲线的“半岛”现象和三个爆炸极限的存在给出理论证明· Ignition in closed H 2 O 2 mixing gas system with chemical measurement was studied based on the theory of chain branching explosion. The mathematical description of the process controlled by the relation of free radical reaction dynamics and by the law of reaction rate and energy conservation is established. The equations with the characteristics of stiffness were solved through Gear computational technique. Free radical medium products, the variation of reaction product concentration and system temperature were examined. Scanning into the p t co ordinate and the ignition limit curve similar to classical experiment result are achieved. The existing of “peninsula” phenomenon of ignition limit and three explosion limits are proven theoretically with a discussion of the defects of classical thermodynamics.
出处 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2000年第5期543-546,共4页 Journal of Northeastern University(Natural Science)
基金 国家自然科学基金资助项目! ( 597760 2 4 )
关键词 链锁分支爆炸 着火“半岛” 自由基基元反应动力学 氢气 氧气 混气系 燃烧学 H 2 O 2 mixing gas, theory of chain branching explosion ignition “peninsula” radical reactions kinetics
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参考文献3

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