RESEARCH OF EXTERNAL HEAT SHOCK PROCESSES FOR PYROTECHNIC METAL OXIDE PRODUCTS IN CONDITIONS OF SHOOTING AND FLIGHT

  • Yevhenii Kyrychenko Cherkasy Institute of Fire Safety named after Chornobyl Heroes of NUCD in Ukraine
Keywords: fire safety, pyrotechnic mixtures, processes of thermal conductivity, gas dynamics, ignition and combustion of metal particles

Abstract

A mathematical model of external thermal shock actions of supersonic air flow  on metal shells of charges of pyrotechnic mixtures of magnesium and aluminum powders and metal oxides, taking into account the temperature dependences of their thermophysical properties and allows with a relative error of 7… 9% to calculate distributions heat flow from the boundary layer along the surface of the shells and the temperature of them thickness has been developed.

A scientifically sound method for determining critical parameters shock thermody (velocities of air flow, time of its action, Reynolds criterion, which characterizes the flow regime (laminar, turbulent)), controlling which by adjusting the technological parameters (ratio and dispersion of components, compaction coefficient, charge diameter and material shell) can prevent premature fire and explosion destruction of products in terms of their launches has been developed.

Published
2022-07-26
Issue
Vol. 5 No. 2 (2021): Collection of Scientific Papers of Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine «Emergency Situations: Prevention and Liquidation»
Section
Статті