Effects of structural congestion and surrounding obstacles on the overpressure loads in explosions: experiment and CFD simulations

An experimental and numerical study was undertaken to identify the characteristics of overpressure loads in offshore platform models subject to hydrocarbon explosions, with a focus on the structural congestion and surrounding obstacles. A large-scale (one-half) test model of a FLNG (liquefied natura...

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Bibliographic Details
Published in:Ships and offshore structures Vol. 13; no. 2; pp. 165 - 180
Main Authors: Bae, Myeong Hyeon, Paik, Jeom Kee
Format: Journal Article
Language:English
Published: Cambridge Taylor & Francis 17.02.2018
Taylor & Francis Ltd
Subjects:
Barriers
Computational fluid dynamics
computational fluid dynamics simulation
Computer simulation
Congestion
Dynamics
Explosions
Floating
Floating structures
Fluid dynamics
FPSO
Hydrocarbon explosion
Hydrodynamics
Liquefied natural gas
Loads (forces)
Mathematical models
Natural gas
Numerical methods
Ocean engineering
Offshore
Offshore drilling rigs
Overpressure
overpressure loads
Storage
structural congestion
Structural members
surrounding structures
Ventilation
ISSN:1744-5302, 1754-212X
Online Access:Get full text
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Summary:An experimental and numerical study was undertaken to identify the characteristics of overpressure loads in offshore platform models subject to hydrocarbon explosions, with a focus on the structural congestion and surrounding obstacles. A large-scale (one-half) test model of a FLNG (liquefied natural gas floating production storage and offloading unit) topside structure was used for the experiment. Computational fluid dynamics (CFD) were used to calculate the overpressure loads in explosions with varying degrees of structural congestion. The overpressure loads tended to be more significant with the increase in structural congestion because the ventilation of exploded gas was retarded due to the obstacles presented by congested structural elements. Also, the overpressure loads with the surrounding structures are much larger than those without them. Details about the test database are documented to provide a useful reference for other researchers to validate numerical and theoretical methods.
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ISSN:1744-5302
1754-212X
DOI:10.1080/17445302.2017.1347978