摘要
根据核爆炸粒子运动的基本壳层理论和粒子与大气相互作用的机理,建立了碎片云在地磁场和大气作用下运动规律的模拟方法。碎片云与大气的作用在方程中包括了电荷交换截面项和碰撞电离截面项,这两项体现了碎片云运动过程中受到大气的阻滞作用。碎片云在地磁场作用下的磁流体力学方程采用拉格朗日差分方法求解,利用该方法计算模拟了典型高空爆炸场景下碎片云的运动扩展情况,给出了爆后早期碎片云在不同方向的扩展尺度、运动速度、压强和温度等参量,与文献结果基本相符。
Based on shell theory of debris and interactions between debris and atmospheric molecules at high altitudes, a method was developed to model HANE debris movement under the effect of geomagnetic field and atmosphere. The charge-exchange section item and collision-ionization section item in the magnetohydrodynamic equation showed the stop action of atmosphere. The Lagrangian differential method was applied to solve the magnetohydrodynamic equation of debris motion in the geomagnetic field. Debris cloud expansion of a typical high altitude detonation was simulated. Expansion scale, velocity, pressure and temperature of early debris in deferent direction were given.
出处
《核技术》
CAS
CSCD
北大核心
2012年第2期156-160,共5页
Nuclear Techniques
