THE INTERACTION OF ACOUSTIC WAVES WITH THE BURNING SURFACE OF CONDENSED SYSTEMS

Abstract : The problem of the acoustic admittance of burning surfaces of condensed explosives and the effect of reflected sound waves on the combustion stability were studied theoretically. The exothermic reaction in the condensed phase, its effect on the burning velocity, and the change in the condensed phase surface temperature under nonsteady-state conditions were taken into account. A theoretical model of the combustion process was used in which the burning zone consisted of 5 regions: a heating region in the condensed phase without a chemical reaction, a chemical reaction region in the condensed phase, a heating region of the gas phase also without a chemical reaction, a chemical reaction region in the gas phase, and a region with gaseous combustion products. Equations describing the linear perturbation of the combustion parameters in regions 1-4 at a harmonic pressure change were derived. (Author)