On the effect of venting large vessels with mass inert panels

Vented gaseous deflagrations

“…When the door is shut or is opened within some small range of angles, we apply formula (17). Above a certain angle, when F(ϕ) reaches a certain fraction A jet of the full area bL, the velocity of gases escaping along the door surface becomes significant, and we have to apply formula (16).…”

“…Above a certain angle, when F(ϕ) reaches a certain fraction A jet of the full area bL, the velocity of gases escaping along the door surface becomes significant, and we have to apply formula (16). To ensure the continuity of transition from the 'pressure' regime of formula (17) to the 'jet' regime of formula (16), we assume this transition to be linear with respect to F(ϕ) and controlled by the 'jet fraction' parameter A jet . We also have to ensure that formula (16) never produces a value greater than formula (17) for the same pressure and cover dimensions.…”

“…The empirical coefficients C jet and A jet in formula (19) were determined through matching of CINDY simulations of Höchst and Leuckel [17] experiments 3-B and 3-D ('experiment 3-B' or '3-B' denotes experimental results plotted in Fig. 3b of their paper; 'experiment 3-D' or '3-D' denotes experimental results plotted in Fig.…”

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The model of explosion pressure build up in enclosures with inertial vent covers and the CINDY code implementing the model are validated against experiments by Höchst and Leuckel (1998) in a 50 m 3 vessel with a pair of ceiling-mounted upwards-opening hinged doors in a 'butterfly' configuration with surface densities of 73 and 124 kg/m 2 under conditions of initially quiescent and turbulent mixtures. The model and the code are further validated against an experiment by Zalosh (1978) in a 33.5 m 3 room-like enclosure with a pair of wall-mounted rectangular doors, in a parallel configuration, each hinged at its bottom edge with a surface density of 23.1 kg/m 2 and initially quiescent mixture.

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CFD Simulations to Study Parameters Affecting Gas Explosion Venting in Compressor Compartments

“…Pu [8] conducted explosion venting tests to analyze the influences of dispersion-induced turbulence and obstacles on 2 Mathematical Problems in Engineering the flame propagation in vessels with volume and length-todiameter ratio varied. Höchst and Leuckel [9] carried out explosion tests using heavy venting devices and explosion doors to analyze the effect of the mass of venting devices in a 50 m 3 silo. However, these efforts mainly focused on small spherical, cylindrical, and cubical vessels with volumes ranging from 0.009 m 3 to 200 m 3 [10].…”