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

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

Abstract

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

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.

Figures/Tables 7

Fig.1 Results of theoretical model and Stuart model

Fig.2 Program flow diagram for the calculation of debris

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

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

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

Fig.6 The max horizontal radius of debris in ORANGE

Fig.7 Simulated shape of debris in ORANGE

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