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Effects Of Obstacles On Premixed Hydrogen-Air Mixtures Explosion In Closed Pipe

S. Z., Sulaiman and R. M., Kasmani and A., Mustafa (2015) Effects Of Obstacles On Premixed Hydrogen-Air Mixtures Explosion In Closed Pipe. Jurnal Teknologi (Sciences and Engineering), 75 (6). pp. 109-113. ISSN 0127-9696 (print); 2180-3722 (online)

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Abstract

Results of experiments on explosion premixed hydrogen-air are presented. The data covers a wide range of hydrogen concentration between 13 to 54 % v/v (Ф= 0.4 to 1.8). The experimental work was performed in a closed pipe containing 90 degree bends with a volume of 0.42 m3operating at ambient conditions. This study was carried out to determine the severity of hydrogen explosion in a closed pipe with length over diameter (L/D) ratio of 51. The results indicate that the worst case accident for hydrogen-air mixture occur at concentration slightly above stoichiometric (Ф 1.2) or 36% v/v. It is also found that pressure downstream the bending region experienced an increase of about 2 times, compared to pressure at the bend. It can be said that a strong backflow or retonation reflecting from the end pipe wall influentthe maximum overpressure downstreamof the bend and this phenomenon was highlighted.

Item Type: Article
Uncontrolled Keywords: Bending, closed pipe, hydrogen concentration, pressure, retonation
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 25 Nov 2015 07:47
Last Modified: 30 Nov 2015 06:27
URI: http://umpir.ump.edu.my/id/eprint/11332
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