To study the influence of flame-spreading behaviour in the ignition process of different charging structures in high-density charge chambers, a visualisation device was designed, and the ignition process of the two charging structures was researched. The flame-spreading process was observed by a high-speed digital camera system and the pressure data was recorded by a data acquisition instrument. According to the experiment, a two-dimensional axisymmetric internal ballistic two-phase flow model was established to simulate the flow process of gas in particle bed based on the Weighted Essentially Non-Oscillatory (WENO) Scheme. The results show that the flow field and flame-spreading status in different charging structures are different. In the full charging structure, the development of the flow field is regular, the flow field in the entire chamber has less fluctuation areas, and velocity vortices only generate during the development of the flow field and when it reaches the wall. However, in the partially charging structure with free space, there are many pressure fluctuation areas in the flow field in the chamber, and the flow field development is also uneven. Pulsating propagation occurs at the interface between particles and free space, which has a great influence on the whole combustion and ignition process. The research results reveal the characteristics of two-phase flow in different charging structures and provide a reference for the actual charging process.

为研究火焰蔓延行为对高密度装药室不同装药结构点火过程的影响，设计了可视化装置，对两种装药结构的点火过程进行了研究。火焰蔓延过程由高速数码相机系统观察，压力数据由数据采集仪记录。根据实验，建立二维轴对称内弹道两相流模型，基于加权基本非振荡（WENO）方案模拟气体在颗粒床中的流动过程。结果表明，不同装料结构的流场和火焰蔓延状态不同。在全充电结构中，流场的发展是有规律的，整个腔室内的流场波动面积较小，速度涡仅在流场发展过程中及到达壁面时产生。然而，在具有自由空间的部分充气结构中，腔室内的流场存在很多压力波动区域，流场发展也不均匀。脉动传播发生在粒子与自由空间的界面处，对整个燃烧和点火过程影响很大。研究结果揭示了不同充注结构中两相流的特征，为实际充注过程提供参考。在具有自由空间的部分充气结构中，腔室内流场压力波动区较多，流场发展也不均匀。脉动传播发生在粒子与自由空间的界面处，对整个燃烧和点火过程影响很大。研究结果揭示了不同充注结构中两相流的特征，为实际充注过程提供参考。在具有自由空间的部分充气结构中，腔室内流场压力波动区较多，流场发展也不均匀。脉动传播发生在粒子与自由空间的界面处，对整个燃烧和点火过程影响很大。研究结果揭示了不同充注结构中两相流的特征，为实际充注过程提供参考。