Experimental study on the coupling effect of heptafluoropropane and obstacles with different slits on the methane-air explosion

Ke Yang, Shujia Chen, Hong Ji, Zhixiang Xing, Yongmei Hao, Kai Zheng and Juncheng Jiang

Energy, 2023, vol. 269, issue C

Abstract: The comprehensive effects of obstacles with different slit and heptafluoropropane on the methane-air explosion characteristics were studied by visual explosion experiment platform. The volume fraction of heptafluoropropane and the number of slits of obstacles were considered. The results show that in the absence of obstacles, 1% concentration of heptafluoropropane accelerates flame propagation. When the concentration of heptafluoropropane is 3%, the explosion overpressure increases by 24.2%, and when 5% heptafluoropropane is used, the overpressure decreases by 10.6%. With the addition of obstacles, the coupling effect of the inhibitor and the obstacle improves the inhibition effect of heptafluoropropane. For obstacles with 2, 3, and 4 slits, 1% concentration of heptafluoropropane failed to significantly accelerate the flame propagation process under obstacle conditions. When the concentration of heptafluoropropane is 3%, the explosion overpressure increases by 9.5%, 5.4%, and 7.5%, respectively. The overpressure decreased by 18.7%, 25.7%, and 20.6% when 5% heptafluoropropane is added. The coupling mechanism significantly enhances the suppression effect of heptafluoropropane on methane explosion under various obstacle conditions.

Keywords: Heptafluoropropane; Methane explosion suppression; Obstacle plate; Slit; Coupling effect (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:269:y:2023:i:c:s0360544223001925

DOI: 10.1016/j.energy.2023.126798

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