微喷混合中的颗粒破碎效应  

Breakup of particles in ejecta mixing

作　　者：孙海权[1] 王裴[1] 陈大伟[1] 秦承森[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100094

出　　处：《爆炸与冲击》2014年第4期392-396,共5页Explosion and Shock Waves

基　　金：中国工程物理研究院科学技术发展基金项目(2013A0201010)

摘　　要：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。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.

关 键 词：流体力学 颗粒破碎 TAB模型 两相流 微喷混合 微喷射 

分 类 号：O359.1[理学—流体力学]