On the stationary theory for heat balance of powder and explosive condensed phases

Abstract

The c-phase thermal processes in stationary burning of powders and explosives are considered. The Frank-Kamenetskii method is used to determine the mass burning velocity and for the approximate solution of equations for thermal conductivity and chemical decomposition. The burning velocity is obtained as a function of the c-phase surface temperature, the degree dispersion and the initial temperature. The stationary burning criterion is given δ0≤0.5. Pressure dependences of the c-phase surface and dark zone temperatures are determined. A theory is presented for the c-phase thermal processes and the c-phase heat balance in stationary burning. The c-phase heat balance is shown to be of importance in investigations on the stability of fuel combustion in a rocket chamber.