A New Method to Assess Mitigation Efficiency of a Protective Barrier Against the Effects of a Vapor Cloud Explosion

Trélat, Sophie; Vyazmina, Elena; Beccantini, A.; Jallais, Simon; Daubech, Jérôme

doi:10.1007/978-3-319-46213-4_123

Cited by 1 publication

(2 citation statements)

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“…This article focuses on the effects of a fast deflagration in a far field (the propagation of the pressure waves). As shown in detail in , there is no need to model the combustion process since we are able to replace it by an equivalent vessel‐burst problem. Summarizing, the pressure in the burst reservoir is taken equal to the maximum pressure P of the Sedov solution; the combustion temperature is the one of the burnt mixture.…”

Section: Deflagration “Equivalent” Problemmentioning

confidence: 99%

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Protective walls against effects of vapor cloud fast deflagration: CFD recommendations for design

Vyazmina

Jallais

Beccantini

et al. 2017

Process Safety Progress

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Protective walls are a well‐known and efficient way to mitigate overpressure effects of explosions. For detonation there are multiple published investigations concerning interactions of blast waves and walls, whereas for deflagration no well‐adapted and rigorous method has been reported in the literature. This article describes the validation of a new computational fluid dynamics (CFD) modeling approach for fast deflagrations. In a first step, the vapor cloud explosion involving a fast deflagration is substituted by an equivalent vessel burst problem. The purpose of this step is to avoid reactive flow computations. In a second step, CFD is used to model the pressure propagation from the equivalent (nonreactive) vessel burst problem. After verifying the equivalence of the fast deflagration and the vessel burst problem in the first step, the ability of two CFD codes FLACS and Europlexus is examined for situations with and without barriers. Parametric analysis by means of numerical simulations is performed to investigate the efficiency of finite barriers to mitigate blast waves. Another parametric study shows how the maximum overpressure value in the shade of the barrier depends on the magnitude of the incoming overpressure wave. On this basis, several recommendations are suggested for designing protective walls. © 2017 American Institute of Chemical Engineers Process Process Saf Prog 37:56–66, 2018

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Section: Deflagration “Equivalent” Problemmentioning

confidence: 99%

“…We have shown that in the case of a fast deflagration, the “vessel burst” temporal decay is equivalent to the decay of the Sedov solution ( t ), see Figure . (see for details)…”

Section: Deflagration “Equivalent” Problemmentioning

confidence: 99%