临近空间核爆炸碎片云运动的数值模拟

doi:10.19596/j.cnki.1001-246x.8492

摘要/Abstract

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。

关键词: 临近空间核爆炸, 碎片云运动, 数值模拟

Abstract:

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.

Key words: near-space nuclear detonation, debris motion, numerical simulation

刘利, 牛胜利, 朱金辉, 左应红, 谢红刚, 商鹏. 临近空间核爆炸碎片云运动的数值模拟[J]. 计算物理, 2022, 39(5): 521-528.

Li LIU, Shengli NIU, Jinhui ZHU, Yinghong ZUO, Honggang XIE, Peng SHANG. Numerical Simulation of Debris Motion from a Near-space Nuclear Detonation[J]. Chinese Journal of Computational Physics, 2022, 39(5): 521-528.

图/表 7

图1 理论模型与Stuart模型的结果

Fig.1 Results of theoretical model and Stuart model

图2 碎片云计算程序流程图

Fig.2 Program flow diagram for the calculation of debris

图3 TEAK试验碎片云模拟参数与实测结果(a) 中心高度; (b) 最大水平半径

Fig.3 Measurement and simulation results of debris in TEAK (a) center height; (b) max horizontal radius

图4 模拟的碎片云运动参数随时间变化(a) 质量和受力; (b) 上升速度和加速度

Fig.4 Simulated parameters of debris motion versus time (a) mass and force; (b) ascensional velocity and acceleration

图5 模拟的(a) 0~10 s和(b) 10~240 s内不同时刻的TEAK试验碎片云形状

Fig.5 Simulated shape of debris in TEAK at different time (a) 0-10 s and (b) 10-240 s

图6 ORANGE试验碎片云最大水平半径

Fig.6 The max horizontal radius of debris in ORANGE

图7 ORANGE试验碎片云形状

Fig.7 Simulated shape of debris in ORANGE

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