水雾输送扩散的数值研究

本文利用边界层能量闭合模式，对金沙江上某地水电站泄洪产生的水雾的输送和扩散过程进行了模拟，分析了对下风方向湿度场的影响和水雾存在范围与主要气象条件的关系。模拟表明：水雾分布范围随水雾源强的增大而增大，并且随风速增加而增加，与背景相对湿度关系不大；相对湿度受影响的范围与背景相对湿度几乎无关，但与水雾的源强，风速有关；在较高背景相对湿度的河谷地带，影响水雾分布范围的最主要因素是水雾源强和风速。

NUMERICAL SIMULATION OF FINE WATER PARTICLES' DIFFUSION

In the paper,a numerical model with energy closure (E-E) has been used to simulate the PBL structure and the diffusion of fine water particles coming from the flood discharge of a water power plant over the ChangJing River. The results indicate that the final distribution of fine water paticles can be affected by the source concentrati0n and wind speed deepIy. The background relative humidity has little effect. The final relative humidity is determined by the background relative humidity,source concentration and the wind speed,but the coverage of final relative humidity, which has been increased by the evap0ration ofthe fine water particles,isn't effected by background relative humidity but is determined by source concentration and wind speed. On the condition of high background relative humidity and lower wind speed,the siurce concentratiin is the main point of the distributiin of thefine water particles. While wind speed is accelarated,both the wind speed and the source concentration become main points.