基于包含扩散方程和离子化学反应方程.的化学物质释放二维动力学模型,利用有限元方法进行了数值模拟,并比较了两类性质不同的气体(SF6和H2O)的扰动特性,结果表明:1)与H2O相比,SF6的扩散速度较慢,反应速率较快,对电离层影响的程度和区域更大更广,更能有效地造成电离层"空洞";2)10kg的H2O,SF6,H2和CO2分别在电离层高度释放,在10min内SF6对电离层临界频率的影响幅度最大,H2O,H2和CO2的影响依次减弱.
A 2-D dynastic model is used,including diffusion equation and chemical reaction equation.And two different chemicals(SF6 and H2O) are compared by numerical simulation using finite element simulation(FES).The results show that :(1) Compared to H2O gas,SF6 has slow diffusion speed and large chemical reaction rates,so it can substantially affect the ionosphere and facilitate the formation of ionospheric hole.(2) After 10kg H2O,SF6,H2 and CO2 release,SF6 has the largest disturbance to foF2 in 10 minutes,disturbance amplitude of H2O,H2 and CO2 decrease orderly.