摘要
在压缩区内 ,飞行体天线辐射出的高频调制场影响等离子体中的电荷分布 ,而电荷分布的扰动又反过来影响场量 .采用FTCS有限差分格式方法 ,利用二维三分量轴对称 ,对空间飞行体与压缩区等离子体非稳态相互作用过程进行数值模拟 ,得到了电荷密度扰动与电磁场的变化情况 .计算结果表明 ,这种非线性相互作用可以引起场的塌缩并出现密度空洞 .通过对密度空洞变化的探测 ,可对隐身飞行体进行跟踪 .
In compression region,high frequency modulational field radiated by antenna system of moving bodies in ionosphere could influence the density distribution of charged particles.A numerical simulation of non-steady interaction between moving bodies and plasma in compression region is presented.This simulation used FTCS method,considering two-dimensional three-component axis symmetrical model.The evolutions of the density disturbance and the electric field with time have been obtained.The outcomes have told us that the non-linear interaction can lead to the collapses of field and the cavitations of density.By detecting the evolution of the cavitations of density,we can trace out the stealth vehicle.
基金
江西省自然科学基金资助项目 ( 9912 0 0 2 )
