Structure of shock and detonation waves propagating in hybrid methane/hydrogen/air/coal dust mixtures

IF 1.7 4区 工程技术 Q3 MECHANICS
A. V. Pinaev, P. A. Pinaev
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引用次数: 0

Abstract

A study of shock and detonation waves propagating in gaseous two-fuel \(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\)/air mixtures and heterogeneous three-fuel \(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\)/air/coal mixtures with the mean bulk density of the coal dust suspension equal to \(95{-}560\,\hbox {g/m}^{{3}}\) and with a particle size of \(0{-}200\,\upmu \hbox {m}\) is performed. The experiments are conducted in a vertical shock tube with a length of 6.75 m and a diameter of 70 mm. The detonation parameters measured in the experiments are compared with the calculated equilibrium thermodynamic values. It is found that the detonation wave parameters are mainly affected by methane and hydrogen rather than by the coal dust suspension. Decaying shock waves are as dangerous as detonation waves because blast wave reflections can initiate detonation. An increase in the hydrogen fraction in the mixture decreases the energy of initiation of \(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\)/air and \(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\)/air/coal mixtures, resulting in a greater hazard for the generation of shock and detonation waves in these mixtures.

Abstract Image

混合甲烷/氢/空气/煤尘混合物中传播的激波和爆震波结构
研究了在煤尘悬浮体的平均容重为\(95{-}560\,\hbox {g/m}^{{3}}\)、粒径为\(0{-}200\,\upmu \hbox {m}\)的情况下,两种燃料的气态\(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\) /空气混合物和三种燃料的非均质\(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\) /空气/煤混合物中传播的冲击波和爆震波。实验在长度为6.75 m、直径为70 mm的垂直激波管内进行。将实验测得的爆轰参数与计算的平衡热力学值进行了比较。研究发现,影响爆震波参数的主要是甲烷和氢气,而不是煤尘悬浮物。衰减的激波和爆震波一样危险,因为爆震波反射可以引发爆炸。随着混合物中氢含量的增加,\(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\) /空气和\(\hbox {CH}_{{4}}/\hbox {H}_{{2}}\) /空气/煤混合物的起爆能降低,导致在这些混合物中产生激波和爆震波的危险更大。
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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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