爆炸烟云中粒子运动的数值模拟  

Numerical study on particle motion in explosion buoyant puff

作　　者：袁涛[1,2] 罗永锋[2] 尚爱国[1] 罗昆升[2] 高洪泉[2] 

机构地区：[1]第二炮兵工程大学,陕西西安710025 [2]第二炮兵装备研究院第二研究所,北京100085

出　　处：《爆炸与冲击》2013年第5期556-560,共5页Explosion and Shock Waves

摘　　要：以10kg TNT爆炸装置在开阔无风地带爆炸为背景,使用Autodyn计算得到爆炸后1ms时的爆轰产物状态,为爆炸烟云中粒子运动的数值模拟研究提供了可靠的源项几何模型和物理参数;而后使用GAMBIT建立了双层源项模型;最后将模型网格导入Fluent软件,建立离散粒子模型,计算得出了1、10、50、100μm粒径的粒子运动轨迹,系统分析了烟云在上升过程中各粒径粒子的分布和运动趋势,给出了不同高度的粒子浓度,为源项分析提供了理论基础。Taking the explosion of a 10 kg TNT explosive device in an open, breezeless zone as the background, the states of the detonation products at 1 ms after the explosion were calculated using Autodyn, which provided reliable source term geometric models and physical parameters for the numerical simulation of the particle motion in the explosion plume. Then a double-layer source term model was established using GAMBIT. Finally, by importing the model into Fluent software, a dis- crete particle model （DPM） was developed. And by using the developed DPM, the particle trajectories of the particles of the sizes of 1, 10, 50 and 100 μm, were calculated systematically, the distribution and movement trends of the different size particles in the smoke rising process were analyzed, and the particle concentrations at different heights were given.

关 键 词：爆炸力学 粒子运动 离散粒子模型 爆炸烟云 

分 类 号：O381[理学—流体力学]