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Physics of spontaneous ignition of high-pressure hydrogen release and transition to jet fire

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Bragin, Maxim and Molkov, Vladimir (2011) Physics of spontaneous ignition of high-pressure hydrogen release and transition to jet fire. International Journal of Hydrogen Energy, 36 (3). pp. 2589-2596. [Journal article]

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DOI: doi:10.1016/j.ijhydene.2010.04.128

Abstract

The aim of this study is to gain an insight into the physical phenomena underlying the spontaneous ignition of hydrogen following a sudden release from high-pressure storage and transition to sustained jet fire. The modelling and large-eddy simulation (LES) of the spontaneous ignition dynamics in a tube with a non-inertial rupture disk separating the high-pressure hydrogen storage and the atmosphere is described. Numerical experiments confirmed that due to the stagnation conditions a chemical reaction first commences in the tube boundary layer, and subsequently propagates throughout the tube cross-section. The dynamics of flame formation outside the tube, simulated by the LES model, has reproduced the combustion patterns, including vortex induced “flame separation”, which have been experimentally observed by high-speed photography. It is concluded that the LES model can be applied for hydrogen safety engineering, e.g. for the development of innovative pressure relief devices.

Item Type:Journal article
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:15353
Deposited By:Professor Vladimir Molkov
Deposited On:22 Aug 2011 16:15
Last Modified:22 Aug 2011 16:15

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