Numerical Study on Internal Ballistics Characteristics of a Solid Propellant Rocket Motor
Keywords:rocket motor, solid propellant, internal ballistics, numerical methods
The viability of numerical simulations to design a solid propellant rocket motor, as opposed to static testing, is discussed in this paper. The results demonstrate that an objectively more detailed insight into the processes taking place within the motor in active combustion can be gained by employing computer simulations. The abundance of readily available computing power allows complex simulations to be run on personal desktop computers, thus, saving money by eliminating the need for static testing during the design phase of the motor. The computer simulation results are validated by a comparison with test data gathered during static tests on the motor. In this study, an RM-12K solid propellant rocket motor is designed and developed, which is currently used in real-world air defence training applications, and therefore, sufficient empirical data are available. The numerical method, based on computer simulations using personal computers, is sufficiently accurate to allow for motor design decisions and an adequate substitute for static testing. Even though a single simulation can take up to 715 h on an 8-core personal machine, it is still an effective solution.