Simulation of the Nonstationary Burning of a Solid Propellant in a Combustion Chamber and Calculation of the Acoustic Admittance of the Combustion Surface of this Propellant

With the use of the model of the nonstationary burning of a solid propellant in a combustion chamber and the model of the gas dynamics of the flow of the combustion products of this propellant, the nonstationary burning of a solid-propellant charge and the flow of its combustion products in a T chamber were numerically simulated. Simulation of the formation and damping of the acoustic vibrations in a T chamber has been performed. Results of calculation of the acoustic admittance of the combustion surface of a powder N are presented. The calculated theoretical dependences of the acoustic admittance of the combustion surface of this solid propellant on the frequency of oscillations of the pressure and on the average pressure in a T chamber are in qualitative agreements with the available corresponding experimental dependences.