Gas explosion analysis of safety gap effect on the innovating FLNG vessel with a cylindrical platform |
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| Institution: | 1. Centre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, Kent Street, Bentley, WA 6102, Australia;2. School of Civil, Environmental and Mining Engineering, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia;3. School of Civil and Resource Engineering, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia;1. School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian 116024, China;2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China;3. Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan;1. Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical Engineering, Universidad de los Andes, Bogotá, Colombia;2. School of Management, Universidad de los Andes, Bogotá, Colombia;3. Centro para la Optimización y Probabilidad Aplicada (COPA), Department of Industrial Engineering, Universidad de los Andes, Bogotá, Colombia;1. Istituto di Ricerche sulla Combustione, CNR, Piazzale Tecchio 80, 80125 Napoli, IT, Italy;2. Dipartmento di Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Alma Mater Studiorum, Università di Bologna, Via Terracini 28, 40131 Bologna, IT, Italy;3. Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, IT, Italy;1. London South Bank University Explosion & Fire Research Group, 103 Borough Rd, SE1 0AA, UK;2. Honeywell Aerospace, Bunford Ln, Yeovil, BA20, UK;1. Department of Production and Quality Engineering, Norwegian University of Science and Technology, NO 7491 Trondheim, Norway;2. Batna University, IHSI-LRPI, avenue Chahid Mohamed Boukhlouf, 05000 Batna, Algeria;3. TOTAL Professeurs Associés, 38, rue du Prieuré, 33170 Gradignan, France |
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| Abstract: | After investigating gas dispersion on a cylindrical Floating Liquefied Natural Gas (FLNG) platform (Li et al, 2016), this second article focuses on assessment of gas explosion by using Computational Fluid Dynamics (CFD). Gas explosion simulations are carried out to evaluate the explosion overpressure mitigating effect of safety gap. The Data-dump technique, which is an effective tool in resetting turbulence length scale in gas explosion overpressure calculation, is applied to ensure simulation accuracy for the congestion scenario with safety gap. Two sets of different safety gaps are designed to investigate the safety gap on the cylindrical FLNG platform, the overall results indicate that the safety gap is effective in reducing overpressure in two adjacent congestions. However, for the explosion scenario where the flame is propagating through several safety gaps to the far field congestion, the safety gap mitigates overpressure only in certain explosion protecting targets. Two series of artificial configurations are modeled to further investigate the explosion scenarios with more than two safety gaps in one direction. It is concluded that the optimal safety gap design in overpressure mitigation for the cylindrical FLNG platform is to balance the safety gap distance ratio in the congested regions. |
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| Keywords: | Gas explosion Safety gap FLACS Cylindrical FLNG CFD |
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