Particle-Scale Research on the Unsteady Gas-Solid Flow in the Launch System with a Complex Charging Structure

Abstract This work is focused on the the intricate behavior of gunpowder particles in a dynamic gas-solid flow with sudden spatial changes, crucial for the stability in a launch system (LS) with a complex charging structure. The 3D particle-scale gas-solid flow model is developed to explore particle detail characteristics in the LS with the hollow base projectile by the CFD-DEM method. The results show that the dispersion of particles characterized by slope stacking and the horizontal stacking when particles are stationary. The axial length of horizontality is 164mm, and the thickness of it is 43mm. The majority of particles are concentrated in the sloped area, and the total length of the three slope stacking is 551mm. The height of the slope shape in the chamber changes exponentially along the axial position, while that of the slope shape in the groove increases linearly along the axial position.