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The surface structure (roughness) of ballistite powder burning under conditions of blowing past the surface is studied. The parameters varied in experiments are the caloricity of powders, the burning rate, the pressure, and the blowing velocity. Regular macroscopic roughness is found on all the specimens examined. A dependence of the roughness height on the blowing velocity and pressure is established. A formula for evaluation of the reduced height of the roughness is derived. Based on the analysis of experimental data, a hypothesis on the roughness-formation mechanism under conditions of blowing is proposed.

Ignition of a reactive substance by a high-temperature discharge cavity is analyzed by an asymptotic method. The effect of heat transfer into the lateral surface of the charge and decrease in the intensity of the radiant flux from the cavity on the moment and critical conditions of ignition is studied. Calculation results are compared with available experimental data.

The wave pattern produced by an electric explosion of flat foil embedded in a semi-infinite cylindrical charge of a gel-like substance is numerically studied. Hydrodynamic parameters are calculated for various initial positions of the foil and parameters of the electric explosion.

Interaction of an incident shock wave (with a rectangular or triangular profile behind its front) with a finite-width semi-infinite cloud of aluminum particles located in a channel along the plane of symmetry is numerically simulated. Shock-wave interaction with the leading edge of the cloud results in the formation of a vortex that leads to cloud dispersion. Reflection of the curved shock wave from the plane of symmetry may be regular or may include the formation of the Mach stem. If the cloud is loaded by a rather strong shock wave, a detonation wave is formed in the cloud. In this case, the flow is periodic, which is caused by passing of transverse waves and their reflection from the walls.

The passage of a detonation wave from a chemically active bubble media into a chemically inert medium (liquid) is studied experimentally. The structure of the transmitted wave and the wave reflected from the butt-end of a shock tube (post-detonation waves) is investigated, and the pressures of these waves for different liquids are measured. The evolution of the post-detonation waves is traced, their velocities are measured, and the attenuation constants of these waves are determined. The energy-dissipation mechanisms for post-detonation waves in liquids are analyzed qualitatively.

Detonation properties of mixtures of condensed high explosives with metal additives are studied. A scheme of measurement of high electrical conductivity of detonation products (σ10 Ω^-1

Deceleration of detonation products of a TATB-based high explosive is studied by a modified target method. Experimental results obtained are compared with data for a high explosive with similar composition and calculation results.

The paper deals with the evolution of the microstructure in materials after explosive loading by the method of a hollow thick-walled cylinder. The materials considered differ in the type of crystal lattice and initial state (grain size and initial defect density). The role of crystal structure in the formation of the microstructure of single crystals and coarse-grain copper specimens formed under explosive deformation is investigated. The microstructures formed are compared with the corresponding strains. It is shown that during high-rate deformation, fragmentation of the structural elements occurs at all scale levels. The fragmentation mechanism and the associated properties depend on the initial structure and state of the material. The special features of the microstructure evolution in materials revealed in this work are taken into account in producing new materials by dynamic and quasidynamic methods.

Various types of dynamic anticumulative protection and the effect of its parameters on jet penetration into a target were studied.

The formation of ions in the volumetric reaction of methane and hydrogen with air is analyzed. In methane