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http://dx.doi.org/10.7842/kigas.2020.24.3.20

Effect of the Obstacles on Explosion Pressure and Propagation Velocity in Closed Tube  

Han, Ou-Sup (Occupational Safety & Health Research Institute, KOSHA)
Lee, Jung-Suk (Occupational Safety & Health Research Institute, KOSHA)
Publication Information
Journal of the Korean Institute of Gas / v.24, no.3, 2020 , pp. 20-26 More about this Journal
Abstract
In this study, experimental study was conducted to examine the influence of explosion pressure and flame propagation velocity of methane-air mixtures due to the obstacles placed in the explosion space. We used the quantified parameter named barrier ratio in order to generalize the effect of explosion pressure and flame propagation velocity in the closed explosion space with obstacles. From experimental observations, the explosion pressure and flame propagation velocity regardless of the number of obstacles increased with barrier ratio. In the same methane concentration of 10% methane, the flame propagation velocity without obstacle (barrier ratio = 0) was 3.46 m/s but 24.24 m/s (increase about 7 times) with 3 obstacle and barrier ratio of 0.98. In the same barrier ratio, explosion pressure and flame propagation velocity increased sharply with increasing of the number of obstacles.
Keywords
methane; gas explosion; obstacle; explosion pressure; flame propgation velocity;
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