The explosion behaviour of heterogeneous/homogeneous fuel-air (hybrid) mixtures is here analysed and compared to the explosion features of heterogeneous fuel-air and homogeneous fuel air mixtures separately. Experiments are performed to measure the pressure history, deflagration index and flammability limits of nicotinic acid/acetone-air mixtures in a standard 20 L Siwek bomb adapted to vapour-air mixtures. Literature data are also used for comparison. The explosion tests performed on gas-air mixtures in the same conditions as explosion tests of dust-air mixtures, show that the increase in explosion severity of dust/gas air mixtures has to be addressed to the role of initial level of turbulence prior to ignition. At a fixed value of the equivalence ratio, by substituting the dust to the flammable gas in a dust/gas-air mixture the explosion severity decreases. Furthermore, the most severe conditions of dust-gas/air mixtures is found during explosion of gas-air mixture at stoichiometric concentration. (C) 2011 Elsevier Ltd. All rights reserved.

Study of the severity of hybrid mixture explosions and comparison to pure dust-air and vapour-air explosions / Roberto, Sanchirico; Almerinda Di, Benedetto; Anita Garcia, Agreda; Russo, Paola. - In: JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES. - ISSN 0950-4230. - 24:5(2011), pp. 648-655. [10.1016/j.jlp.2011.05.005]

Study of the severity of hybrid mixture explosions and comparison to pure dust-air and vapour-air explosions

RUSSO, PAOLA
2011

Abstract

The explosion behaviour of heterogeneous/homogeneous fuel-air (hybrid) mixtures is here analysed and compared to the explosion features of heterogeneous fuel-air and homogeneous fuel air mixtures separately. Experiments are performed to measure the pressure history, deflagration index and flammability limits of nicotinic acid/acetone-air mixtures in a standard 20 L Siwek bomb adapted to vapour-air mixtures. Literature data are also used for comparison. The explosion tests performed on gas-air mixtures in the same conditions as explosion tests of dust-air mixtures, show that the increase in explosion severity of dust/gas air mixtures has to be addressed to the role of initial level of turbulence prior to ignition. At a fixed value of the equivalence ratio, by substituting the dust to the flammable gas in a dust/gas-air mixture the explosion severity decreases. Furthermore, the most severe conditions of dust-gas/air mixtures is found during explosion of gas-air mixture at stoichiometric concentration. (C) 2011 Elsevier Ltd. All rights reserved.
2011
nicotinic acid; hybrid explosion; deflagration index; dust explosion
01 Pubblicazione su rivista::01a Articolo in rivista
Study of the severity of hybrid mixture explosions and comparison to pure dust-air and vapour-air explosions / Roberto, Sanchirico; Almerinda Di, Benedetto; Anita Garcia, Agreda; Russo, Paola. - In: JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES. - ISSN 0950-4230. - 24:5(2011), pp. 648-655. [10.1016/j.jlp.2011.05.005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/509564
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