甲烷-氧混合爆轰起爆的比较研究:光滑管起爆与单孔板下游再起爆

IF 1.7 4区 工程技术 Q3 MECHANICS
X. Lv, X. Yan, X. Wang, X. Yu, Y. Hou, T. Li, Y. Wang, J. Yu
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引用次数: 1

摘要

对孔板下游的爆轰再起爆与光滑管中典型的爆燃-爆轰过渡进行了实验对比研究。本研究采用两种管型来研究化学计量甲烷-氧混合物中爆轰的起爆,即在自持爆轰传输入口放置光滑管和带有单孔板的管。燃烧波速测量和烟叶可视化是表征爆轰起爆的方法。引入了与腔室尺寸、管径、孔径相关的无量纲参数,分析了爆轰起爆过程。结果表明:爆轰起爆距离对初始压力的依赖总体上接近于反比关系,且孔板下游的爆轰再起爆拟合程度较高。无论是在光滑管中爆燃-爆轰过渡,还是在孔板下游的爆轰再起爆,当池尺寸小于无阻管的特征尺寸时,CH \(_{4}\) -2O \(_{2}\)固有不稳定性对爆轰起爆的影响都显著增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Comparative study on the onset of detonation in methane–oxygen mixtures: initiation in a smooth tube and re-initiation downstreamof a single orifice plate

Comparative study on the onset of detonation in methane–oxygen mixtures: initiation in a smooth tube and re-initiation downstreamof a single orifice plate

An experimental comparative study of the detonation re-initiation downstream of an orifice plate and the typical deflagration-to-detonation transition in a smooth tube is carried out. In this study, two tube configurations are employed to study the onset of detonation in stoichiometric methane–oxygen mixtures, i.e., a smooth tube and a tube with a single orifice plate placed in the entrance of the self-sustained detonation transmission. Combustion wave velocity measurement and soot-foil visualization are used to characterize the initiation of detonation. The dimensionless parameters correlated with cell size, tube diameter, and orifice diameter are introduced to analyze the detonation initiation process. The results indicate that the dependence of the detonation initiation distance on the initial pressure as a whole is close to inverse proportionality, and the fitting degree is higher for the detonation re-initiation downstream of the orifice plate. The effect of inherent instability of CH\(_{4}\)–2O\(_{2}\) on the onset of detonation is significantly enhanced when the cell size is smaller than the characteristic dimension of an unobstructed tube, either for deflagration-to-detonation transition in a smooth tube or for the detonation re-initiation downstream of an orifice plate.

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来源期刊
Shock Waves
Shock Waves 物理-力学
CiteScore
4.10
自引率
9.10%
发文量
41
审稿时长
17.4 months
期刊介绍: Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.
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