某小口径变燃速密实装药火炮内弹道两相流模型仿真分析

Numerical Simulation of a Two-phase Flow Interior Ballistics Model of Variable-Burning Rate and High-Density Charges for a Certain Light Caliber Cannon

利用现代内弹道理论,建立了某小口径变燃速密实装药火炮内弹道两相流体力学模型,并进行了数值仿真分析。结果表明:变燃速密实装药能在控制膛压的情况下,有效提高弹丸初速;火药颗粒钝感层厚度和底火药量对弹道性能影响较大;压力波状况的模拟可用于火炮发射安全性分析。

A two-phase flow interior ballistics mathematical model was established, in which the effect of the variable-burning-rate is concerned in a high-density gun and numerical simulation was conducted. The simulation results show that the variable-burning-rate and high-density charge have obvious effects on improving the muzzle velocity under controlling pressure in the chamber, and the insensitivity layer thickness of the propellant grain and primer powder quantity affect the interior ballistics performance obviously. Simulation results for the shape of pressure waves in the chamber are of benefit to the safety analysis of gun shooting.