Experimental investigation and numerical simulation of solid fuel rocket engine internal ballistic

The present survey focuses on experimental and numerical investigation of internal ballistic of Solid Fuel Rocket Engine (SFRE) for three different grains: bottom back-burning, annular side back-burning and all-side back-burning. To validate the developed numerical solution some experiments were performed and numerical results were compared to them. Accordingly the numerical results were compatible with that of experimental in an acceptable fashion which means the applied numerical method was appropriate to predict the behavior of SFRE. According to result, ignoring the transient effects, the combustion chamber pressure increased with increasing the area of burning region and vice versa. Also with increasing the combustion chamber pressure the effects of erosion burning declined. The more the combustion chamber pressure, the more the engine performance and the more the specific impulse were. Mostly the bottom back-burning grains provided constant-area burning region and consequently a constant pressure profile. Also area of burning region followed increasing and decreasing patterns for annular side back-burning and all-side back-burning respectively.