地面连续点源催化剂的扩散

在人工影响天气的作业和科学试验中,除了在云中或云下播撒、爆炸分散和燃烧分散催化剂以外,在某些地区相宜季节还可使用在地面或高山顶侧以点源形式燃烧催化剂人工影响降水的方法,地面点源可分瞬时点源和连续点源两种类型.建立了地面连续点源扩散模式.研究结果表明在不稳定、中性和稳定3种大气层结条件下地面连续点源的垂直扩散高度分别为640 m,555 m和475 m,而水平最大扩散宽度对应为600 m、450 m和430 m,催化剂的最大浓度中心都集中于催化剂发生器喷嘴的上方附近.在冬季,如果将源建立在较高的山坡或山顶上人工影响冬季降水是可能成功的,而在其它季节能否成功要视具体情况而定.

DIFFUSION OF CATALYTIC AGENTS RELEASED FROM CONTINUOS POINT SOURCS ON THE GROUND

In weather modification and scientific experiments, except in the cases of seeding, detonating and burning catalytic agents in the or under the clouds, it is suitable to use the method of point-source burning on the ground or on the top of mountains in some regions and certain seasons. There are two kinds of sources on the ground, i.e. instantaneous and continuos point sources. The diffusion model of continuous point sources on the ground is established. The results show that under the conditions of unstable, neutral and stable atmospheric stratification, the vertical diffusion altitudes of continuos point sources on the ground are 640 m, 555 m and 475 m respectively, while the maximum widths of diffusion are 600 m, 450 m and 430 m correspondingly; the maximum concentration center of catalytic agents is slightly above the spray nozzle of catalytic generator. In wintertime, if a continuos point source is established on the top or side of a mountain, there is high possibility for artificial modification clouds and rains, but the possibility depends on specific conditions.