Effects Of Obstacles On Premixed Hydrogen-Air Mixtures Explosion In Closed Pipe
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 conditi...
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| Format: | Article |
| Language: | English English |
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Penerbit Universiti Teknologi Malaysia
2015
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| Online Access: | http://umpir.ump.edu.my/id/eprint/11332/ http://umpir.ump.edu.my/id/eprint/11332/ http://umpir.ump.edu.my/id/eprint/11332/ http://umpir.ump.edu.my/id/eprint/11332/1/Effects%20Of%20Obstacles%20On%20Premixed%20Hydrogen-Air%20Mixtures%20Explosion%20In%20Closed%20Pipe.pdf http://umpir.ump.edu.my/id/eprint/11332/7/Effects%20Of%20Obstacles%20On%20Premixed%20Hydrogen-Air%20Mixtures%20Explosion%20In%20Closed%20Pipe.pdf |
| Summary: | 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.
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