Simulation of the process of entrainment of a powder particles by explosive shock waves

Abstract

The coating on the surface of metals and alloys is used to increase strength and durability of materials. There are many different technological schemes of this process. It is of interest to use the explosion energy to create a stream of particles deposited on the surface of metals. The article is based on a simple physical model describing the process of interaction between the products of detonation of the explosive substance with the particles of a powder in an explosive spraying of wear-resistant coatings. The entrainment of particles occurs due to inelastic collisions of molecules of detonation products with particles of a powder. An equation for determining the velocity of particles in the wave front, formed during the explosion of a spherical explosive charge, is received. The equation of motion of the particles can be written for the case of an explosion of a cylindrical charge of explosive. The solving algorithms of the obtained equation are analyzed depending on the dynamic characteristics of detonation products. The obtained results can be used for designing the technological schemes of explosive deposition and making the theoretical analysis of the process of superdeep penetration of particles of a powder in a metallic target.

Keywords

• explosion shock wave
• detonation products
• powder particles