Xu, B. P., Wen, Jennifer X., Dembele, S., Tam, V. H. Y. and Hawksworth, S. J. (2009) The effect of pressure boundary rupture rate on spontaneous ignition of pressurized hydrogen release. Journal of Loss Prevention in the Process Industries, Volume 22 (Number 3). pp. 279-287. doi:10.1016/j.jlp.2008.07.007

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Abstract

The effect of pressure boundary rupture rate on hydrogen spontaneous ignition has been numerically investigated. A mixture-averaged multi-component approach was used for accurate calculation of molecular transport. Spontaneous ignition and combustion chemistry were accounted for using a 21-step kinetic scheme. A 5th-order WENO scheme coupled with ultra fine meshes was employed to reduce false numerical diffusion. The study has demonstrated that the rupturing process of the initial pressure boundary has important influence on the spontaneous ignition of pressurized hydrogen release. When the pressure boundary rupture rate is below a certain threshold value, the predictions showed that there would be no spontaneous ignition. As the rupture rate increases, the shock-heated air temperature drops more quickly due to earlier flow expansion. Once the rupture rate is sufficiently high, spontaneous ignition can still occur. However, the initial flame width would be narrower compared to the sudden release case.

Item Type:	Journal Article
Divisions:	Faculty of Science > Engineering
Journal or Publication Title:	Journal of Loss Prevention in the Process Industries
Publisher:	Elsevier Ltd
ISSN:	0950-4230
Official Date:	2009
Dates:	Date Event 2009 Published
Volume:	Volume 22
Number:	Number 3
Page Range:	pp. 279-287
DOI:	10.1016/j.jlp.2008.07.007
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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