- Title
- Influence of Gradually Inflated Obstructions on Flame Propagation in a Tube Closed at One End
- Creator
- Peng, Zhengbiao; Zanganeh, Jafar; Moghtaderi, Behdad
- Relation
- Fire Vol. 6, Issue 4, p. 154-154
- Publisher Link
- http://dx.doi.org/10.3390/fire6040154
- Publisher
- MDPI AG
- Resource Type
- journal article
- Date
- 2023
- Description
- Rapid suppression is a must in the mitigation of ventilation air methane (VAM) explosions. Flame suppression proves to be much more challenging than prevention of flame initiation due to the small physics timescale (~1 s). This study numerically investigates the effect of spherical obstructions on flame propagation dynamics in a tube closed at one end. Obstructions with an inflating geometry, installed at different locations, were examined. Noticeably, in the presence of a single or multiple obstructions that partially block the tube, flame and pressure waves propagate faster upstream than in an empty tube; this phenomenon is more pronounced when the obstruction is located further away from the ignition point. In scenarios of a full blockage of the tube, the high pressure builds up inside the blocked region, e.g., surging up to 7.5 bar in less than 0.1 s at a location 10 m away from the ignition point (tube diameter: 0.456 m). Obstructions located closer to the ignition point experience more tearing in terms of duration and strength.
- Subject
- flame suppression; explosion; obstruction; flame propagation; pressure wave propagation; SDG 13; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1488838
- Identifier
- uon:52546
- Identifier
- ISSN:2571-6255
- Language
- eng
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