中文摘要：

根据CE／SE方法思想，构造在变换坐标系下内弹道两相流动数值计算的格式．采用此格式研究了膛内瞬态二维两相流动点火过程．数值计算结果反映实际规律并和试验结果符合．结果表明，对中心点火方式，在点传火过程初期，膛内压力在径向和轴向上存在较大的压力梯度，当火药全部着火后，药室内压力在径向上逐渐趋于一致．这表明CE／SE方法能够完全模拟瞬态二维两相流动的情况．

英文摘要：

A numerical scheme for solving transient two-phase flows in interior ballistics is induced according to the theory of space-time conservation element and solution element （CE/SE） method under the transformed coordinates. The ignition process of two-dimensional two-phase flows is studied by the CE/SE method. Compared with the experimental data, the numerical results simulate the actual process. At the initial phase of ignition, a steep pressure gradient exists along the radial and axial directions in barrel chamber. When all the propellants are ignited, the pressure gradient in the radial direction vanishes. It shows that the two-dimensional CE/SE method is effective for solving transient two-phase flows in guns.