水平圆柱形Hele-Shaw电池中超稀薄氢-空气火焰的分类和动力学

IF 1 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
P. V. Moskalev, V. P. Denisenko, I. A. Kirillov
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引用次数: 0

摘要

采用逐次倒投影法,研究了超低温氢-空气火焰在水平圆柱形Hele-Shaw槽内自由传播的动力学特性。为了量化火焰动力学的两个揭示特征——平均火焰速度对时间的依赖性和初始火焰速度对初始氢-空气混合物化学计量的依赖性——我们提出了时间和化学计量的标度关系。第一个关系式近似于氢-空气混合物中初始氢浓度超过某一临界值时火焰锋面路径的依赖性。第二个关系式近似于初始火焰前速度对氢浓度的依赖关系。拓扑结构不同类型的超稀薄氢-空气火焰的一般关系可以被解释为存在一种一般机制的附加证据,这种机制可以通过分岔级联从孤立漂移球火焰的离散锋面过渡到准连续爆燃火焰锋面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Classification and Dynamics of Ultralean Hydrogen–Air Flames in Horizontal Cylindrical Hele–Shaw Cells

Classification and Dynamics of Ultralean Hydrogen–Air Flames in Horizontal Cylindrical Hele–Shaw Cells

Using the successively inverted projection method, we studied the dynamics of ultralean hydrogen–air flames propagating freely in a horizontal cylindrical Hele–Shaw cell. To quantify the two revealed characteristics of the flame dynamics—the dependence of the average flame velocities on time and the dependence of the initial flame velocity on the stoichiometry of the initial hydrogen–air mixture—we proposed time and stoichiometric scaling relations. The first relation approximates the dependence of the path of the flame front in hydrogen–air mixtures with an initial hydrogen concentration exceeding a certain critical value. The second relation approximates the dependencies of the initial flame front velocities on the hydrogen concentration. The general relationships for topologically different types of ultralean hydrogen–air flames can be interpreted as additional evidence of the presence of a general mechanism for the transition from discrete fronts of isolated drifting ball flames to a quasi-continuous deflagration flame front through a cascade of bifurcations.

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来源期刊
CiteScore
1.90
自引率
9.10%
发文量
130
审稿时长
3-6 weeks
期刊介绍: Journal of Experimental and Theoretical Physics is one of the most influential physics research journals. Originally based on Russia, this international journal now welcomes manuscripts from all countries in the English or Russian language. It publishes original papers on fundamental theoretical and experimental research in all fields of physics: from solids and liquids to elementary particles and astrophysics.
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