Abstract:

In this paper, the development trend of solid rocket motor (SRM) is discussed, and it is considered that high energy, high pressure, high overload, wide adaptation and extreme dimension are the most important development trends. The most important supporting techniques for the future development and applications of SRM include multi-discipline design and optimization, refinement design and performance precision control, virtual test and digital twin, and advanced experiment and measurement technology. In order to achieve the fine-grained modeling, multi-dimension design and high-precision simulation of SRM, the basic issues of combustion and flow in SRM that need to be paid attention to include combustion mechanism and model of solid propellant on mesoscopic scale, condensed phase motion behavior and multiphase flow transportation law, nonlinear combustion instability mechanism, impact pattern and force/heat effect of condensed phase on the wall surface, ablation mechanism and failure mode of adiabatic structure, energy release and conversion law during the formation and transportation procedure of a multiphase combustion product. At the end of the paper, the suggestions are proposed for better achievement in the forementioned basic research, and better development of SRM.

Key words:  Solid rocket motor, Solid propellant, Combustion instability, Multiphase flow, Ablation, Thermodynamics calculation