考虑火炮身管后坐的内弹道两相流数值仿真方法

Numerical Simulation Method of Two-phase Flow in Interior Ballistics Considering Recoil of Artillery Barrel

为准确计算火炮内弹道两相流动力学各参量以及膛内弹丸的运动规律,提出一种内弹道两相流动力学与火炮发射动力学耦合计算的仿真方法。对经典内弹道、不考虑后坐运动的内弹道两相流以及耦合计算得到的内弹道参量变化规律进行分析,耦合计算得到的膛压及初速与实验值吻合良好。分析基于经典内弹道理论和耦合算法得到的弹丸运动规律,耦合算法能够得到反映膛内弹丸实际运动变化规律的结果,表明该方法可为内弹道和发射动力学准确计算提供参考。

In order to accurately calculate the parameters of the two-phase flow dynamics in the artillery and the movement law of the projectile in the bore,a simulation method for coupling calculation of the two-phase flow dynamics in interior ballistics and launch dynamics is proposed.The variation law of the interior ballistics parameters obtained by the classic interior ballistics,the two-phase flow in interior ballistics without considering recoil motion and the coupling calculation are analyzed.The bore pressure and initial velocity obtained by the coupling calculation are in good agreement with the experimental values.The motion law of projectiles obtained by basing on the classical interior ballistic theory and the coupling algorithm are analyzed,the coupling algorithm can obtain the results reflecting the actual motion change law of the projectiles in the bore.It shows that this method can provide a reference for accurate calculation of interior ballistics and launch dynamics.