Developments in vapour cloud explosion blast modeling

Mercx, W.P.M.; Berg, A.C. van den; Hayhurst, Colin J.; Robertson, N.J.; Moran, K.C.

doi:10.1016/s0304-3894(99)00085-0

Cited by 48 publications

(16 citation statements)

References 3 publications

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“…Unfortunately, the literature does not disclose a detailed description of the TNO values 31,32 . The curve of the CFX simulation data seems to follow between levels 5 and 7.…”

Section: Resultsmentioning

confidence: 99%

A CFD-based Approach to Predict Explosion Overpressure: A Comparison to Current Methods

Díaz‐Ovalle

López‐Molina

Vázquez-Román

2017

Chem.Biochem.Eng.Q.

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A CFD-based approach has been developed in this work to predict the overpressure produced during an explosion. An adiabatic exothermal reaction allows computing the explosion energy release. To validate the proposed CFD approach, overpressure predictions based on this methodology are compared with results produced with the TNObased method. It is demonstrated that the physics adopted in our model produces satisfactory predictions in the open area. The CFD simulations were carried out in the ANSYS CFX tool. The source of energy corresponds to the one produced by a stoichiometric proportion in reactants without energy generation. The explosion analysis considered that explosion occurs geometrically as a sequence of control volumes. Thus, the explosion in a volume is assumed to occur when the maximum pressure is achieved in the previous control volume. This way, the explosion is propagated and it is shown that it is equivalent to conventional predicting methods.

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“…Unfortunately, the literature does not disclose a detailed description of the TNO values 31,32 . The curve of the CFX simulation data seems to follow between levels 5 and 7.…”

Section: Resultsmentioning

confidence: 99%

A CFD-based Approach to Predict Explosion Overpressure: A Comparison to Current Methods

Díaz‐Ovalle

López‐Molina

Vázquez-Román

2017

Chem.Biochem.Eng.Q.

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“…The turbulent burning velocity, S t , was calculated based on where L t is the turbulent scale, u t is the turbulence intensity, S l is the laminar burning velocity and is the kinematic viscosity of the unburned mixture. Further details of the computational codes were reported by Van den Berg et al [19][20][21] The initial laminar combustion rate was described using a quasi-laminar modification. The other adjustable parameter, F s , represents the influence of pressure, temperature and flame front wrinkling on the laminar burning velocity.…”

Section: Computation Codesmentioning

confidence: 99%

Premixed methane/air gas deflagration simulations in closed-end and open-end tubes

Hong

Lin

Zhu

2016

International Journal of Spray and Combustion Dynamics

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The overpressures, flame velocities and flow speeds were investigated in closed-end and open-end tubes via numerical simulations. Our results suggest that the tube geometry influences the evolution of these parameters. The peak overpressure initially decreased and eventually increased with the aspect ratio in both types of tubes. The flow speed initially increased and then decreased with the propagation distance in the closed-end tube, but it increased with increasing distance in the open-end tube. Empirical equations relating the peak overpressure and the peak flow speed are presented. The flame velocities in the open-end tubes were always greater than those in the closed-end tubes, especially the maximum flame velocity. The open end promoted flame acceleration, while the closed end resulted in near-wall deceleration. The results provide a reference for future limited-space gas explosion studies.

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“…Mercx et al [15] stated that a homogeneous obstacle configuration is fully characterised by only two parameters: a volume blockage ratio (VBR) and an obstacle size (D o ). The spacing between the obstacles is measured by a combination of these two variables.…”

Section: The Boundary Conditionsmentioning

confidence: 99%

“…The number of obstacles met by the flame is known as the most significant variable for the development of overpressure. The combined parameters to characterise the boundary conditions is proposed by Mercx et al [15], and the combination is given by:…”

Section: The Boundary Conditionsmentioning

confidence: 99%