Cellular detonation diffraction in gas–particle mixtures

Numerical simulation of one-dimensional aluminum particle–air detonation with realistic heat capacities

“…Benkiewicz and Hayashi [19,20] simulated one-dimensional and two-dimensional cellular structures of Al-oxygen detonation and discussed the influence of particle diameter. Federov et al [21,22] calculated both ideal and cellular detonation diffraction, and compared the results with gaseous detonation to reveal the special characteristics of dusty detonation. Veyssiere et al [23] studied Al-air and Al-oxygen detonation initiations and found that the critical initiation energy is correlated with the cellular width.…”

“…Briand et al [31] used this model for cellular detonation simulations, and also compared their results with those from the classic diffusion model. The particle heat capacities in the hybrid model are constant, following the setting in the diffusion models [17][18][19][20][21][22][23]. Because the particle realistic heat capacities vary with temperature in a wide range, this setting should be replaced when kinetics-controlled combustion is included.…”

Physical and mathematical model of detonation in aluminum gas suspensions with regard for transition processes of nanosized particle flow, heat transfer and combustion

“…Fedorov et al [6,[10][11][12][13][14]19]. This criterion was substantiated in [27] when considering the ignition of aluminum particles in a shock wave, taking into account surface oxidation reactions and polymorphic transformations of the oxide.…”

“…According to the data given in [16], the burning time of aluminum particles in a mixture of oxygen and nitrogen in the range 10 nm -100 nm obeys the dependence [6] used in the analysis and numerical modeling of micron particle suspensions [10][11][12][13][14]19], the reaction of reduced kinetics was assumed to be of the Arrhenius type with an activation energy of 32 kJ/mol (half the data for aluminum nanoparticles), thus reflecting the transitional combustion regime.…”

“…The problems of detonation initiation and propagation in monodisperse and polydisperse mixtures and specific features of cellular detonations were investigated in [8][9][10][11] for aluminum suspensions with particle diameter from 1 μm to 10 μm. Studies of plane and cellular detonation diffraction on backward step were performed in [12][13][14][15].…”