Prediction of Combustion Instability in Composite Solid Propellant Rocket

The oscillation and turbulence in the combustion chamber pressure causes to the combustion instability. The range of these oscillations depends on the propellant formulation, and components of the structure and the grain design, as well as the operating conditions of the motor. It is possible that the combustion instability doesn't lead to explosion and destruction, however, it is not desirable to the ideal design. In this paper, while study the process of solid propellant combustion and combustion instability, its possible effects on motor performance are discussed. The factors affecting the formation of instability, such as grain dimensions, combustion gas flow rate, erosive burning and combustion chamber pressure have been studied. In addition to the review of empirical method for the combustion instability study, the prediction of combustion instability in composite solid-propulsion motors by means of modeling, numerical solution and simulation methods is described