Research of digital simulation of internal ballistic performance of a solid rocket motor

The digital simulation method of internal ballistic properties of solid rocket motor is studied, including determining its random variables, modifying the theoretical formulation for correcting pressure and thrust based on the tested data and deriving the simulation mathematic model. The method can be used for the scheme selection, performance estimation and flow field computation of solid motor. On the basis of the digital simulation of internal ballistic properties for a solid rocket motor, the mean value and variance of internal ballistic properties are given, such as, average pressure and thrust, maximum pressure, specific impulse and total impulse. The results of simulation agree well with test data, showing that the digital simulation model of internal ballistic properties of solid rocket motor is reliable.