火炮发射与控制学报

建立了二维两相流内弹道数学模型，并利用该模型对某大口径火炮发射内弹道过程进行了模拟，获得了膛压、气相速度、发射药燃烧特性等内弹道参数的时间演化过程和空间分布规律。通过将膛压曲线和内弹道相关参数的模拟结果与试验结果的对比，验证了二维两相流内弹道数学模型的正确性。利用二维两相流内弹道数学模型，研究和分析了点火管长度对内弹道环境的影响。结果表明，点火管长度越小，发射药着火同时性变差，火焰沿轴向的传播更加困难，因此在内弹道初期压力分布不均匀性更加明显，导致了严重的压力波动现象，膛压曲线的光滑性也较差，内弹道性能变差，内弹道环境恶化。

A two-dimensional two-phase flow numerical model of interior ballistics was established. The interior ballistic process of a large caliber cannon was simulated by this model. The time evolution and spatial distribution law of interior ballistic parameters, such as chamber pressure, gas phase velo-city and propellant combustion characteristics, were obtained. By comparing simulation results and experimental results of chamber pressure curves and interior ballistic parameters, the accuracy of the two-dimensional two-phase flow numerical model of interior ballistics was verified. The influence of the length of ignition tube on interior ballistic environment was studied and analyzed based on this model. The results show that with a decrease in the length of the ignition tube, the ignition synchronicity of the propellant would become worse, and it would be harder for the flame to spread axially. Therefore, the uneven pressure distribution at the initial stage of the interior ballistics is more obvious, which leads to severe pressure fluctuations, the poor smoothness of the pressure curve and interior ballistic perfor-mance, as well as the deteriorated interior ballistic environment.