Model of Chemical Reaction Kinetics for Calculating Detonation Processes in Gas and Heterogeneous Mixtures Containing Hydrogen Peroxide

Numerical study of cellular detonation structures of methane mixtures

“…The detonation cell size for the methaneeair mixture was determined in a procedure similar to that used in the numerical study of regular and double-scale cellular structures, see (Trotsyuk, 1999; Fomin et al, 2006;Vasil'ev et al, 2010). The initial height of the channel H was chosen rather arbitrarily; usually, it was assumed to be slightly higher than the presumed size of the cell a 0 .…”

“…A two-scale (bifurcation) cellular detonation structure was first found in numerical studies of the DW structure in hydrogeneoxygen mixtures with the addition of hydrogen peroxide (Fomin et al, 2006;Vasil'ev et al, 2010). Note that in the vast majority of studies, regular cellular structures in model gas mixtures have been simulateded; see the literature review in papers by Fomin et al (2006) andVasil'ev et al (2010). Real mixtures are studied using detailed kinetic mechanisms of gas reactions.…”

On the Features of Thermal Convection in a Compressible Gas

“…The expression in the first brackets in the formula (10) for the critical height represents a constant, and the expression in the second bracket for simplicity we consider at high-temperature T >> C, where C = 120°K and μ 0 = 18.71•10 −6 Pa•s [19]. The value of dynamic viscosity of air here μ 0 corresponds to the selected temperature T 0 = 300°K.…”

“…Since the degree of explosiveness of the mixture is determined by the concentrations of the fuel and the oxidizer, and convective processes lead to mutual movement and mixing of the fuel and oxidizer masses with changes in their local concentrations in certain areas, an explosion-proof mixture can become locally explosive and vice versa, an explosive gas mixture can become explosion-proof. The latter processes require a detailed study, and the mode, structure and intensity of convective motion are of decisive importance here, since they determine the mutual arrangement, and mixing of fuel, oxidizer and their concentrations [6][7][8][9][10]. Thus, it is the convective flow in this case that forms a potentially explosive gas-vapor medium from vaporized residues of liquid fuel and gaseous oxidizer.…”