串联多药室火炮内弹道两相流数值模拟

Two Phase Flow Numerical Simulation of Interior Ballistics of the Series Chamber Gun

为了利用串联多药室技术对现有火炮系统进行改造达到提高弹丸动能的目的,建立了某口径串联多药室火炮发射系统的物理模型及一维两相流数学模型,运用MacCormack差分格式对其进行数值模拟。利用编制的串联多药室内弹道仿真软件,研究分析了主副药室装药量比、副药室点火延迟及活塞质量对串联多药室火炮内弹道性能的影响。计算结果表明,串联多药室火炮可以在不增加膛压的情况下达到提高弹丸初速的目的,对于改进和提高武器性能具有重要意义。

Series chamber is a new technology on the basis of the mature technology of solid propellant.It can improve the propeller’s kinetic energy through rebuilding the existed guns.It is important to the weapons’ performance improvement.The two phase flow model of the interior ballistics process of 140 mm series chamber gun is established and simulated by MacCormack scheme.In addition,the completed programming has been used to analyze the influence of main-secondary powder proportion,ignition delay of secondary power and piston mass on interior ballistics performance.The result shows that the new technology can improve propeller’s velocity while not adding chamber’s pressure.