Xianzhao Song
(, ), Shuxin Deng
(, ), Hao Lu
(, ), Jing Zhang
(, ), Bin Li
(, ), Lifeng Xie
(, ), Yong He
(, ), Mingyang Wang
(, )
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The explosion venting characteristics of hydrogen/methane/air mixtures under the congestion of obstacles
To investigate the characteristics of vented explosions in stoichiometric hydrogen/methane/air mixtures in the presence of obstacles, experiments were conducted within a cylindrical duct, taking into account the effects of hydrogen concentration, blockage ratio (BR), and the number of obstacles. The results indicate that internal and external peak overpressures generally increase with a higher hydrogen fraction. A higher propensity for transitioning from deflagration to detonation is observed under conditions of elevated hydrogen concentration and higher BRs. The rupture shock overpressure increases with the hydrogen fraction, peaking with five obstacles, and then decreases as the BR further increases. This pattern is also observed in the overpressure of external explosions and the maximum temperature of external flames. Given the impact of blast overpressure on human safety and structural integrity, the minimum safe distance required for equipment is notably greater than that for personnel. These results contribute to the safe and efficient use of hydrogen/methane blended gases.
期刊介绍：
Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences.
Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences.
In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest.
Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics
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