Effectiveness of Diluent Gases on Hydrogen Flame Propagation in Tee Pipe(part II) β Influence of Tee Junction Position
Gas explosions in obstructed vessels have been investigated for many years. However, the flame acceleration mechanism of enriched-hydrogen fuels with diluents in the piping system has received little systematic study in the literature. This particular study aimed to analyse the flame front mechanism...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier Ltd
2017
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/16552/ http://umpir.ump.edu.my/id/eprint/16552/ http://umpir.ump.edu.my/id/eprint/16552/ http://umpir.ump.edu.my/id/eprint/16552/1/Effectiveness%20of%20diluent%20gases%20on%20hydrogen%20flame%20propagation%20in%20tee%20pipe%20%28part%20II%29%20%E2%80%93%20Influence%20of%20tee%20junction%20position.pdf |
| Summary: | Gas explosions in obstructed vessels have been investigated for many years. However, the flame acceleration mechanism of enriched-hydrogen fuels with diluents in the piping system has received little systematic study in the literature. This particular study aimed to analyse the flame front mechanism of
hydrogen-diluents/air explosion inside the pipe by considering the influence of tee junction distance
from the ignition points. The tests were performed using H2/diluents-air at different concentrations and ignition positions, in two different tee junction pipe configurations. From the results, the worst case
of explosion severity was found in 95% H2β2.5% Arβ2.5% N2/air for all ignition positions. In general, if ignition happened at the tee junction, the overpressure and rate of pressure rise profiles showed almost a
similar trend on both configurations. Similar trend was also observed for the flame flow characteristic analysis. Overall, it was clearly demonstrated that a shorter distance between ignition point and obstacles resulted in higher explosion severity. |
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