弹道学报2025，Vol.37Issue(1)：20-27,8.DOI:10.12115/ddxb.2023.08008
点传火方案对火药颗粒低温破碎特征的数值分析
Numerical Analysis on the Effect of Ignition Schemes on Low Temperature Crushing Characteristics of Propellant Particles
林杨淦 1刘东尧1
作者信息
- 1. 南京理工大学 能源与动力工程学院,江苏 南京 210094
- 折叠
摘要
Abstract
To improve the propulsion safety of large-caliber solid propellant guns,the ignition system usually includes a primer and a flash tube in the axis of chamber.The combustion and flow of ignition propellant can be illustrated as a one-dimensional two-phase flow model.Combined with the one-dimensional two-phase model of main charge,the double one-dimensional two-phase model can be established for the simulation of interior ballistic process.Under a certain charge condition,the stress and fragmentation characteristics of the propellant particles were numerically simulated with the experimental stress and fragmentation function of the propellant particles in the bore.The simulation results show that the degree of fragmentation increases from 2.184 to 2.781,with an increase of 27.3%,as the mass of propellant in flash tube increases from 90 g to 110 g.The degree of fragmentation decreases from 2.487 to 1.35,with a decrease of 45.7%,as the length of the flash tube increases from 0.3 m to 0.38 m.The degree of fragmentation decreases from 2.487 to 1.997,with a decrease of 19.7%,as the diameter of the flash tube increases from 30 mm to 35 mm.The increase of mass of propellant in flash tube will lead to the increase of fragmentation in the charge bed,and the increase of the length or diameter of the flash tube will reduce the charging density of propellant in the flash tube,resulting in the decrease of fragmentation in the charge bed.关键词
内弹道/火药破碎/低温/发射安全性Key words
interior ballistics/propellant crushing/low temperature/launch safety分类
武器工业引用本文复制引用
林杨淦,刘东尧..点传火方案对火药颗粒低温破碎特征的数值分析[J].弹道学报,2025,37(1):20-27,8.
