1. Effectiveness of diluent gases on hydrogen flame propagation in tee pipe (part II) – Influence of tee junction position.
- Author
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Emami, Sina Davazdah, Kasmani, Rafiziana Md., Naserzadeh, Zahra, Che Hassan, Che Rosmani, Hamid, Mahar Diana, Sulaiman, Siti Zubaidah, Ibrahim, Norazana, and Samsudin, Mohd Dinie Muhaimin
- Subjects
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HYDROGEN flames , *GAS explosions , *PIPING , *HYDROGEN production , *IGNITION temperature , *ENERGY research - Abstract
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 H 2 /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% H 2 –2.5% Ar–2.5% N 2 /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. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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