Study On Combustion Characteristics And Two-Phase Flow Of The Base-Bleed Aluminized Composite Propellant

The bottom of the exhaust is increasing technology an important rocket, in view of the technology in the application of base bleed projectile dispersion deviation problem in solving large deposit, the aluminum composite base bleed propellant combustion and reaction of two-phase flow will help the problem.The main work is the experimental study and the results of treatment, access to AP-based composite propellants thermodynamic parameters of each component in the thermal decomposition under sub-atmospheric conditions, the experimental data obtained on the basis of using discrete element as the theoretical basis of PFC software, based on "random package" hypothesis, consider the anisotropic characteristics of composite propellants of different substances, established pharmaceutical aluminum particles in the bottom row in the development of a detailed physical model of movement in the combustion characteristics by numerical simulation of the aluminum particles, aggregation features and motion features. The use of chemical kinetics analysis software CHEMKIN, build AP/HTPB detailed chemical reaction mechanisms and surface reaction mechanisms Al particle combustion of Al/AP/HTPB composite propellant combustion bottom row adiabatic flame temperature and AP decomposition process, and ultimately all mass fraction of gaseous products of numerical simulation, and in-depth analysis of individual chemical reactions Al particles and oxidant, to reveal more detailed combustion mechanism of Al particles have some reference.The dynamic model of the bottom row of pharmaceutical burning, burning the bottom row of the internal flow regarded Gas-particle flow, establish a one-dimensional two-phase flow of physical and mathematical models of the trajectory, and the boundary conditions and calculation processes were analyzed.Through research and analysis of the above numerical simulation, can reveal deeper into the bass bleed of complex agents combustion characteristics and combustion mechanism and other issues, to provide data base for future experimental research.