Mathematical model of the distribution of electrical and thermal energy in the working element of an information and measurement system designed to study the process of initiating industrial explosives

• Published in: Journal of physics. Conference series 2021-02, Vol.1745 (1), p.12049
• Main Authors: Krivchenko, E S, Nechaev, A S, Moshchenskij, Y V, Bogacheva, O A
• Format: Article
• Language: English
• Subjects: Boundary conditions; Demolition; Detonation; Electric contacts; Explosives; High rise buildings; Mathematical models; Physics; Spatial distribution; Thermal conductivity; Thermal energy
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1745/1/012049

The use of sensitive explosives to detonate the main charge during perforation of solid rock layers, demolition of high-rise and strong structures, etc. is an inconvenient and dangerous method of initiation. This makes it urgent to develop and implement alternative methods for detonating explosives. One of these methods is to transmit a thermal pulse of the required power using thermal conductivity from a metal rod to an explosive. The determination of the thermal power of the pulse required for the occurrence of detonation is carried out by indirect measurements. The rating allocated by standard heat rod method is pretty rude, does not account for losses at the points of contact and spatial distribution of heat in the core, depending on the electric pulse parameters. In this paper, mathematical models of the formation of a thermal field in the rod, taking into account these factors, are constructed. Based on the results of the obtained models, numerical calculations are made for rods of different sizes and signals of different shapes and power. The results of the work allow us to determine the necessary initial and boundary conditions for a further description of fast-flowing thermal processes.