Discrete Group Gas-Solid Two-Phase Flow Model and Its Simulation inthe Large Caliber High Speed Davis Gun

Aim ing at the characteristics of the long tubular powder, a one-dimensional discrete group gas-solidtwo-phase flow model was established for the large caliber high speed Davis gun with a tubular modular charge.In this model, the tubular modules were described by the Lagrangian system without being assumed as pseudofluid , whereas the gas fie ld is described by Eulerian system. The new model was used to simulate a 480 mmDavis gun. The simulation results were compared with test results, and the model was verified to be feasibility.This study provides a new method to research the interior ballistic performance of Davis guns.