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REGIMES OF HYDROGEN JET FIRE IN AN ENCLOSURE WITH TWO VENTS

Molkov, Vladimir and Shentsov, Volodymyr (2014) REGIMES OF HYDROGEN JET FIRE IN AN ENCLOSURE WITH TWO VENTS. In: Sixth International Symposium on Non-equilibrium Processes, Plasma, Combustion, and Atmospheric Phenomena, Sochi Russia. Torus Press. 8 pp. [Conference contribution]

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Abstract

This numerical study aims at understanding the regimes of non-premixed hydrogen combustion in an enclosure with two vents. It has been demonstrated previously that the increase of flow rate in the enclosure with one upper vent changes a ¦re regime from well-ventilated, when all hydrogen is consumed by combustion within the enclosure, to an under-ventilated fire. The under-ventilated ¦re in the enclosure with one vent has been characterized by transition of internal jet ¦re intoexternal flame attached to the vent at moderate flow rates, to complete self-extinction of combustion within and without the enclosure at higher flow rates, and again to external flame at increased further flow rates. Fire in the enclosure with two vents demonstrates similar behavior withthe transition from well-ventilated ¦re to under-ventilated ¦re with the external flame regime, when the flame is attached to the upper vent, with the increase of the leak flow rate. However, with further increase of flow rate, the complete self-extinction is not observed and there is a very small area just above the hydrogen release pipe where combustion is sustained for the rest of the release.

Item Type:Conference contribution (Paper)
Keywords:Jet fire, indoor, ventilation, vents
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Hydrogen Safety Engineering and Research Centre (HySAFER)
ID Code:36886
Deposited By: Mr Volodymyr Shentsov
Deposited On:14 Feb 2017 09:19
Last Modified:17 Oct 2017 16:27

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