Internal chamber modeling of a solid rocket motor: Effects of coupled structural and acoustic oscillations on combustion

This paper outlines modeling considerations for the internal ballistics of solid rocket motors. The simulation model consists of three coupled physical components, including the combined propellant and motor structure, the core fluid flow and the propellant combustion. A coupling component is also employed to control the fluid–structure–combustion interaction during the simulations. The results of simulating a motor firing illustrate the coupled effects of the structural and acoustic oscillations with the combustion model. Comparisons of the predicted results with experimental test results indicate a good correlation exists, providing support for the present simulation model.