摘要
为研究大口径埋头弹二次点火过程中燃烧室内部的流场特性,采用基于欧拉-欧拉方法的二维轴对称两相反应流模型,结合动态网格划分理论和用户自定义函数技术,对105 mm埋头式穿甲弹的二次点火内弹道过程进行数值模拟。研究结果表明:可燃导向筒破裂后主装药床被点燃,燃气在弹底区域汇聚,形成局部涡流,涡流强度逐渐增大,涡流中心温度逐渐升高;在气相力的作用下,主装药床沿轴向和径向挤压至弹底区域,然后被大量燃气冲散至整个燃烧室;二次点火过程中最大膛底压力为560 MPa,炮口初速达到1650 m/s。
The flow field characteristics inside the combustion chamber during the secondary ignition process of a large caliber cased telescoped ammunition(CTA)is studied.A two-dimensional axisymmetric two-phase reacting flow model based on the Euler-Euler approach is used,combined with dynamic grid division theory and user-defined function technology,to numerically simulate the secondary ignition internal ballistic process of a 105 mm CTA armor-piercing projectile.The results show that the main charge bed is ignited after the rupture of combustible guide tube,and the gas converges in the bottom area of the projectile,forming local eddies.The intensity of the eddies gradually increases,and the temperature at the center of the eddies gradually increases.Under the action of gas phase force,the main charge bed is compressed axially and radially to the bottom area of the projectile,and then is dispersed by a large amount of gas into the entire combustion chamber.It is found that the maximum breech pressure during the secondary ignition process is 560 MPa,and the muzzle velocity reaches 1650 m/s.
作者
郭俊廷
余永刚
GUO Junting;YU Yonggang(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2024年第7期2282-2293,共12页
Acta Armamentarii
关键词
埋头弹药
两相反应流
内弹道
流场特性
数值模拟
cased telescoped ammunition
two-phase reacting flow
internal ballistics
flow field characteristic
numerical simulation
