Estimation of the pressure built up in a nonhermetic vessel upon combustion of a solid-propellant composition

We have developed an approximate mathematical model that allows one to calculate the pressure in a nonhermetic vessel upon combustion of a solid-propellant composition in it. Laboratory experiments showing the validity of the model were performed. It is shown that a maximum pressure is attained long before the combustion of the solid-propellant composition in a nonhermetic room.