Abstract
ABSTRACT Large-particle porous propellant has good surface-enhancing combustion performance and may improve the muzzle velocity of combustion propulsion system effectively. The proposed particle element method is further refined to investigate particle motion characteristics and flow field distribution in a large-particle charge combustion system with moving boundary. The particle element parameter aggregation is established to describe particle parameter distribution in the system, and the motion is controlled by particle motion equations during combustion and propulsion, so that the particle element is stretched and coupled with the gas phase. The particle element method accurately describes the distribution of the particle movement process and the evolution of the flow field in the chamber, and the numerical simulation results are in good agreement with the AGARD code. In particular, the overall efficiency of the entire calculating procedure is improved by 21.7%. The research results will effectively solve the flow field problem in the large-particle charge combustion system.
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