中文摘要：

为了研究爆炸及燃烧产生的＂蘑菇＂状烟云,采用中尺度气象模式RAMS（regional atmospheric modeling system）模拟研究了冲击波过后的爆炸烟云运动过程.流场和涡度场结果显示,对于稳定层结大气条件,爆炸烟云在浮力作用下会形成浮力涡环结构;烟云在到达最大高度以后,形成了环套环的多涡结构.通过模拟不同爆炸当量和不同大气稳定度的烟云上升最大高度,得到了与目前常用的爆炸烟云上升公式一致的形式.

英文摘要：

In order to study ＂mushroom＂ cloud produced by explosions and combustions, the mesoscale meteorological model RAMS （regional atmospheric modeling system） was used to simulate the explosion cloud movements after the shock waves. In stably stratified atmosphere, it is shown from wind fields and vorticity results that a buoyant vortex ring structure will be formed. When an explosion cloud reaches its maximum height, multi-vortex structures of circles in circle patterns will be produced. The maximum height of the explosion cloud is obtained by computations with different explosion energies and atmospheric stable parameters, and it agrees with that obtained with the commonly used formula.