ID#: 14
Abstract Title: On Modeling of Shock Waves Interactions with Dusty Gas Layers
Session Title: Dusty Shocks/Detonations
Session Date: 7/31/01
Session Start Time: 3:40 PM
Contributing Author: Korobeinikov, V.P.
Organization: Institute for Computer Aided Design
Country: Russia
Authors: R. Klemens, P. Wolanski, P. Kosinski, V. Korobeinikov, I. Semenov, V. Markov
Short Abstract: Physical processes of coal dust/air mixtures motion, ignition, and combustion behind shock waves are numerically studied. Mathematical modeling methods are used. The moving medium is treated as two-phase, two-velocity and two-temperature continuum with mechanical and thermal interaction between the phases, and taking into account extraction of volatiles from particles, gas-gas and gas-particle exothermic chemical reactions, viscosity, diffusion, radiation and heat conduction. In the paper we focus on two aspects of the problem on unsteady processes behind shock waves propagating in a gas over dust layers. The first one concerns the dust entrainment and dispersion from the dust layer behind a shock wave in a tube or a gallery. In this paper we simulate the particle lift and dust dispersion from the thin layers near walls by taking into account lifting forces due to particles rotation and gas vorticity. The second aspect is ignition and burning in a gallery of arising two-phase mixture. It was shown by calculations that temperature of mixture is high behind the shock and burning process takes place for shock Mach number equals to 3 (or grater than 3). The results of the calculation are demonstrated in Figures and diagrams. The comparisons of the results with available experiments are briefly discussed.