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http://dx.doi.org/10.7731/KIFSE.2014.28.3.034

Quantitative Difference in the Extinguishing Concentration of Inert Gases with Fire Suppression Criteria in a Cup Burner Test  

Cho, Jae-Ho (Dept. of Fire & Disaster Prevention, Daejeon University)
Hwang, Cheol-Hong (Dept. of Fire & Disaster Prevention, Daejeon University)
Publication Information
Fire Science and Engineering / v.28, no.3, 2014 , pp. 34-42 More about this Journal
Abstract
The concentrations of inert gases ($N_2$, Ar, $CO_2$ and He) required to induce the flame instabilities such as swing, rotation, lifted and blow-out were measured in a cup burner nonpremixed flames for $CH_4$ and $C_3H_8$ fuels. Quantitative differences in the extinguishing concentration with fire suppression criteria (i.e. blow-out or onset of flame instability) were also examined. It was found that the difference in extinguishing concentration was increased with the appearance of lifted flame and the low extinguishing performance of inert gaseous. The maximum difference in extinguishing concentration with the suppression criteria was approximately 35% at the highest fuel velocity condition (1.3 cm/s) for the $C_3H_8$-air nonpremixed flame. It can be also expected that the extinguishing concentration by the criteria based on the onset of flame instability will provide the useful information from the viewpoint of the accurate and economical design concentration.
Keywords
Cup burner; Suppression criteria; Extinguishing concentration; Inert gas; Flame instability;
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Times Cited By KSCI : 2  (Citation Analysis)
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