Effectiveness of diluent gases on hydrogen flame propagation in tee pipe (part II) – Influence of tee junction position
| Autor: | Mahar Diana Hamid, Sina Davazdah Emami, Zahra Naserzadeh, Rafiziana Md. Kasmani, Che Rosmani Che Hassan, Mohd Dinie Muhaimin Samsudin, Siti Zubaidah Sulaiman, Norazana Ibrahim |
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| Rok vydání: | 2017 |
| Předmět: |
Piping
Materials science Hydrogen 020209 energy General Chemical Engineering 05 social sciences Organic Chemistry Flow (psychology) Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Mechanics Diluent law.invention Overpressure Ignition system Acceleration fluids and secretions Fuel Technology chemistry law Position (vector) 0502 economics and business 0202 electrical engineering electronic engineering information engineering 050207 economics |
| Zdroj: | Fuel. 190:260-267 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/j.fuel.2016.11.018 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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