播撒盐粉局部消除暖雾的数值模拟

NUMERICAL SIMULATION OF WARM FOG DISSIPATION BY SALT-SEEDING

本文使用二维暖雾数值模式来研究人工播撒盐粉局部消除暖雾的物理过程以及盐粉粒子半径、盐粉播撒量、雾层厚度和雾中液水含量对消雾效果的影响。结果表明,使用盐粉局部消除暖雾以增大播撒区的能见度是完全可能的。一般来讲,较大的盐粉粒子和较大的播撒量更有利于提高消雾的效果,但消雾的成本以及对环境的污染也随之加大。文章最后对使用大水滴代替盐滴进行消雾的可能性提出初步的看法。

A two-dimensional,time-dependent numerical model has been used to study the possibility and the micro-physical Processes of a warrn fog dissipation in a limited area by seeding with small salt particles. The effects of the salt particle size the amount of salt seeded in an area of 1m2, the thickness of the fog and the liquid water content in the fog on the efficiency of the fog dissipation have been investigated.It has been indicated by the results that it is possible to increase the visibility in fogs by salt-seeding in a limited area. The larger the salt particle size and the more the amount of salt seeded,the more efficient the fog dissipation seems to be, but the cost and the pollution on environment are also increased. Finally, the possibility of using large water drops in warm fog dissipation has been discussed.