临近空间核爆炸碎片云运动的数值模拟  

Numerical Simulation of Debris Motion from a Near-space Nuclear Detonation

作　　者：刘利 牛胜利[1] 朱金辉[1] 左应红[1] 谢红刚[1] 商鹏 LIU Li;NIU Shengli;ZHU Jinhui;ZUO Yinghong;XIE Honggang;SHANG Peng(Northwest Institute of Nuclear Technology,Xi’an,Shaanxi 710024,China)

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《计算物理》2022年第5期521-528,共8页Chinese Journal of Computational Physics

基　　金：强脉冲辐射环境模拟与效应国家重点实验室专项经费资助项目(SKLIPR.1504)。

摘　　要：从质量守恒和动量守恒方程出发,考虑能量耗散、空气密度随高度变化、X射线沉积能量致大气温升和辐射冷却等影响因素,建立临近空间核爆炸碎片云运动演化的流体力学模型。计算TEAK试验和ORANGE试验碎片云扩展和上升运动,给出碎片云中心高度、水平半径、上升速度和形状等典型参数的演化,与实验测量数据基本相符。计算模型可为电离层效应和人工辐射带效应提供缓发辐射源参数。Based on conservation of mass and momentum,a fluid dynamics model of debris motion from a near-space nuclear detonation is established.Many influence factors are considered,such as energy dissipation,air density as a function of height,gravity,increasing air temperature caused by X-ray deposition and radiation cooling.A computation program is developed.The expansion and upward motion of debris in TEAK and ORANGE tests are calculated.Evolution of typical parameters such as central height,maximum horizontal radius,ascending velocity,and shape of debris are given.They are in accordance with experimental data.The model provides delayed radiation source parameters for ionospheric effect and artificial radiation band effect.

关 键 词：临近空间核爆炸 碎片云运动 数值模拟 

分 类 号：O242.1[理学—计算数学]