Comparison of blast curves from vapor cloud explosions |
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| Institution: | 1. School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian, Liaoning 116024, PR China;2. Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan;1. Centre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, Kent St, Bentley, WA 6102, Australia;2. Aspec Engineering Pty Ltd, Level 12, 28 The Esplanade, Perth, WA 6000, Australia;1. School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK;2. DNV GL, Spadeadam Test Site, MoD R5, Gilsland, Brampton, Cumbria, CA8 7AU, UK;1. State Key Laboratory of Fine Chemicals, Department of Chemical Machinery and Safety Engineering, Dalian University of Technology, 2 Linggong Rd., Dalian 116024, China;2. School of Chemical Engineering, Dalian University of Technology, 2 Linggong Rd., Dalian 116024, China |
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| Abstract: | Several sets of blast curves are frequently used in the prediction of blast effects from vapor cloud explosions. However, they have not been validated by experiments since systematic experimental data have only become available in recent years. The aim of this paper is to present a comparison between the calculated blast curves and available experimental data. Also presented is a comparison between several blast curves. The comparison showed that for detonations and subsonic flames, the blast curves produced by one-dimensional numerical calculations are generally in agreement with experimental data. However, there is great difference between the measured and calculated overpressures for supersonic deflagrations. The experimental overpressures fall well below the calculated values and decay much faster. The discrepancy is more pronounced for less reactive mixtures. It can be concluded from the comparison that the prediction using one-dimensional numerical calculations is conservative and may be overly conservative for supersonic deflagrations. |
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