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Effectiveness of diluent gases on hydrogen flame propagation in tee pipe (part II) – Influence of tee junction position

Emami, S. D. and Kasmani, R. M. and Naserzadeh, Z. and Che Hassan, C. R. and Hamid, M. D. and Sulaiman, S. Z. and Ibrahim, N. and Samsudin, M. D. M. (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

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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:flame acceleration mechanism, flame flow
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:76192
Deposited By: Widya Wahid
Deposited On:12 Apr 2018 13:43
Last Modified:12 Apr 2018 13:43

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