Effectiveness of Diluent Gases on Hydrogen Flame Propagation in Tee Pipe(part II) – Influence of Tee Junction Position

Sina Davazdah, Emami and Rafiziana, Md. Kasmani and Zahra, Naserzadeh and Che Rosmani, Che Hassan and Mahar Diana, Hamid and Siti Zubaidah, Sulaiman and Norazana, Ibrahim and Mohd Dinie Muhaimin, Samsudin (2017) Effectiveness of Diluent Gases on Hydrogen Flame Propagation in Tee Pipe(part II) – Influence of Tee Junction Position. Fuel, 190. pp. 260-267. ISSN 0016-2361. (Published)

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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 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% H2–2.5% Ar–2.5% 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.

Item Type:	Article
Uncontrolled Keywords:	Explosion severity; Hydrogen; Diluents; Obstacles; Tee pipes
Subjects:	T Technology > TP Chemical technology
Faculty/Division:	Faculty of Chemical & Natural Resources Engineering
Depositing User:	Mrs. Neng Sury Sulaiman
Date Deposited:	26 Apr 2017 02:22
Last Modified:	26 Apr 2017 02:22
URI:	http://umpir.ump.edu.my/id/eprint/16552
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