基于辐流计算的强爆炸火球光辐射功率走时研究  

INVESTIGATION OF FIREBALL RADIATION POWER-TIME HISTORY IN STRONG EXPLOSION BASING ON RADIATION HYDRODYNAMICS CALCULATION

作　　者：高银军[1] 闫凯[1] 田宙[1] 刘峰[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《固体力学学报》2013年第S1期95-98,共4页Chinese Journal of Solid Mechanics

摘　　要：大气层强爆炸过程中,火球光辐射发展是一个重要的物理过程.由于强爆炸所释放的巨大能量以光辐射形式向外传递,同时在空气中形成强烈的冲击波,二者耦合作用下,形成了火球及光辐射的扩张过程,因此强爆炸火球光辐射的研究,需要以辐射流体力学为基础,建立相应的物理模型.论文基于辐射流体力学计算方法,利用算子分裂将方程分为对流项和刚性源项,二者独立求解,有效解决了强爆炸火球光辐射计算中的辐射能流不稳定性问题.给出的光辐射功率走时曲线,与已有结果和经验公式一致,计算效率在原有基础上也得到了明显提升.The development of fireball radiation is an important physical process during strong explosion in air.The energy released by strong explosion is transferred as radiation,and in the meantime strong shocks are formed.Due to this two effects,the expanding process of fireball radiation is produced.In order to investigate the fireball radiation of strong explosion,the physical model should be established on base of radiation hydrodynamics.In this paper,the radiation hydrodynamics equations are split into convection and sourece items,which are solved independently in order to avoid instability of the radiation flux.Through this method,power-time history of radiation is given,showing fine accordance with experiential formula.In the meantime calculational efficiency is increased obviously.

关 键 词：辐射流体力学 光辐射 功率走时 

分 类 号：O38[理学—流体力学]