Determination of explosion parameters of methane-air mixtures in the chamber of 40dm3 at normal and elevated temperature

Temperature and pressure influence on explosion pressures of closed vessel propane–air deflagrations

“…Such a variation was reported for both experimental and calculated (adiabatic) explosion pressures of various gaseous mixtures: methane-air, by Pekalski et al [21] (measurements made in a standardized 20 L sphere); synthetic biogas (CH 4 -CO 2 mixture)-air, by Dupont and Accorsi [25] (20 L sphere); propane-air, by Desoky et al (14 L sphere) [5]; LPG-air, by Huzayyin et al [13] (2.56 L cylinder). In contrast to them, measured explosion pressures on CH 4 -air (experiments made in a 40 L sphere) were fitted versus temperature by a linear equation [23]. In all cases, the observed decrease of peak pressures in preheated flammable mixtures was explained by the decrease of density for the burning charge, which releases thus a lower heat amount.…”

“…Explosion pressures of fuel-air mixtures at pressures and/or temperatures different from ambient were determined in a wide set of conditions (explosion vessels with various forms and volumes; ignition made by local sources with various energies, from a few mJ up to 20 J; position of the ignition source: central or asymmetric) [5,6,10,11,13,[17][18][19][20][21][22][23][24][25][26][27]. The data refer to single fuels, such as hydrogen, methane, propane, propylene or to composite fuels (LPG, gasoline).…”

The rate of pressure rise of gaseous propylene–air explosions in spherical and cylindrical enclosures

“…Many articles report experimental values of maximum rates of pressure rise and/or explosion index from measurements on homogeneous gaseous mixtures in spherical and in cylindrical enclosures [4,[6][7][8][9][10][11][21][22][23][24][25][26]. Published data refer mainly to H 2 -air [9,10], CH 4 -air [2,4,9,10,16,23,25,26] and C 3 H 8 -air mixtures [9][10][11], but also to ethylene-air [9] and fluorinated derivatives of methane-air and ethylene-air [24,25] [26]; 120 L [10] and even 25 m 3 [6,7], in cylindrical vessels with low L/D ratio [10,11,26] or in elongated cylinders [8,9,23]. Such information is completed by the data in the present article: values of maximum rate of pressure rise and explosion index of propylene-air mixtures at various initial pressures and various fuel/oxygen ratios in three closed vessels: a spherical vessel with central ignition and two cylindrical vessels with central or top ignition.…”

Coupling Relation Between Air Shockwave and High-Temperature Flow from Explosion of Methane in Air

“…This knowledge can also provide a reference for the investigation of the causes of explosion accidents involving methane-in-air mixtures. Previously published works focus on the explosion of methane in air mixtures in vessels and its corresponding parameters [8][9][10][11][12][13][14]. The mechanics of the behavior of a gas explosion in a long duct have been investigated by many researchers [15][16][17][18][19][20].…”