微喷混合中的颗粒破碎效应

采用TAB模型，基于气-粒两相流程序对液态金属铅颗粒在氦气中的破碎过程进行了分析，获得了破碎特征时间、破碎后颗粒尺度等关键力学量；并对充气微喷射实验进行了数值模拟，考虑颗粒破碎效应后的模拟结果与实验结果较好符合。结果证实了充气条件下液态金属颗粒的再次破碎现象，可加深认识微喷混合的物理规律。

Breakup of particles in ejecta mixing

Ejecta mixing takes place at the meta-gas interface under strong shock, where the breakup of ejected particles is a very important affecting factor. By adopting Taylor analogy breakup (TAB) model, the breakup effect of the melted lead on its transportation in helium gas was analyzed. The calculation adopted the two-phase flow (including gas and particle) numerical program. From the simulation results, some significant mechanical quantities were obtained, including the breakup time and sizes of the ejected particles. Meantime, the lead ejecta mixing process was simulated considering that the particle breakup was consistent with the experiments. These results give some important references in understanding the process of ejecta mixing.