Evaluation of the ballistic properties of a solid propellant from its granulometric composition

This work is aimed at evaluating the effect of a solid propellant’s granulometric composition on its burning rate and, more in general, on its ballistic properties, as packing, density, or specific impulse. To evaluate the burning rate, a combustion model is developed in MatLab. To conclude, a model predicting the viscosity of a bimodal propellant is introduced. The obtained results show a significant agreement between experimental data, used as references, and the predicted ones. This work is the starting point from which other works can arise, improving the combustion model and expanding the viscosity estimation also for trimodal propellants.