Electrothermal Chemical Guns Ballistic Process Meshless Method For The Numerical Simulation

Interior ballistic process of Electrothermal Chemical Guns(ETCG) is extremely complex, which involves two-phase flow dynamics, heat transfer, combustion, chemical kinetics, turbulence mechanics, detonation and many other subjects.There are a variety of physical intensity intermittent problems, such as the detonation wave, shock wave and flame pass the fire-hole high-speed jet, etc. and the gap between the cartridges and discontinuity of playing after the free space which form a strong discontinuity in space is caused by the charging structure and the initial loading condition.Great difficulties is brougth by continuous and intermittent physical space for the traditional method of numerical simulation application based on grid. The biggest advantages of the non-grid method of are that they don't need mesh in the problem domain,which is free from the shackles of the discontinuity of the problem (such as the reconstruction of the grid, etc.),and ensure the solution accuracy.Smooth particle hydrodynamics (SPH) simulation method is a meshless particle method, which has a wide range of applications in the field of fluid mechanics and solid mechanics,such as the elastic flow, magnetic hydrodynamics, multiphase flow and metal forming simulation and so on.Another important application of The SPH method is simulationing high explosive combustion and explosion phenomena,which is an important new numerical simulation method in transient physics.This dissertation simulates the interior ballistic process of Electrothermal Chemical Guns with medium of solid-state chemistry by means of the SPH method, fluid within the process simulation,which is a transient physical processes of two-dimensional axisymmetric an gas-solid two-phase.The basic equations of fluid mechanics in combination with Electrothermal Chemical Guns interior ballistic assumption, based on written in Fortran computer program within the SPH interior ballistic process, interior ballistics of some important parameters, temperature, pressure, and porosity and other space-time changes in the simulation analysis. The results show that the computer program of trajectory written by the SPH method is feasible,and the results basically accord with experimental data.