摘要
Abstract
In order to optimize the charge design of modular charge and deeply analyze the deep mechanism of internal ballistic stability of single-module charge,the influence law of different loading positions of modular charge cartridge and the dispersion state of powder particles after the cartridge was broken on internal ballistic characteristics such as pressure wave was studied.Based on the classical internal ballistic theory,the one-dimensional gas-solid two-phase flow internal-ballistic model of modular charge was established,and the MacCormack difference method was used for numerical calculation,and the variation law of its internal-ballistic parameters in time and space was compared and analyzed.Numerical calculation,analysis and comparison were carried out for the interior ballistic process of six working-conditions,in which the distance between the initial position of the modular medicine box and the bore bottom was 0 mm,100 mm,200 mm,300 mm,400 mm and 500 mm.The result shows that different initial loading positions of the modular medicine box have a certain influence on the interior ballistic characteristics.With the increase of the distance between the module cartridge box and the chamber bottom,the maximum pressure in the chamber increases first and then decreases,and the muzzle velocity of the projectile also increases first and then decreases.When the initial position of the cartridge box is 100 mm from the bottom of the chamber,the maximum pressure and the maximum muzzle velocity of the projectile reach.Numerical simulation and analysis were conducted on the internal ballistic process of the broken module cartridge in three states:uniform dispersion,linear dispersion,and post stack dispersion.The results show that the uniform and linear dispersion of the cartridge has little effect on the internal ballistic parameters,while the post stack dispersion of the cartridge can prolong the entire combustion process and reduce the peak pressure in the chamber and the exit velocity of projectile.关键词
模块装药/压力波/药粒散布/装填状态/数值模拟Key words
module charge/pressure wave/dispersion of drug particles/loading status/numerical simulation分类
军事科技
