核电厂重要厂用水系统鼓风式机械通风冷却塔优化研究

核电厂的重要厂用水系统通常采用鼓风式机械通风冷却塔,而鼓风式机械通风冷却塔的相关研究比较少,对塔内的空气动力特性不太了解.本文通过物理模型试验的方法对其空气动力特性进行研究并对塔型进行优化,研究表明：塔的总阻力系数随塔出口收缩段高度的增大而增大,随收缩段与水平夹角α的减小而减小,随填料安装高度的减小而减小;填料断面风速分布均布系数基本不受收缩段高度的影响,其随α的减小而增大,随填料安装高度的减小而减小.

Optimizing study on the forced draft mechanical cooling tower of nuclear power plant

The forced draft mechanical cooling tower is commonly used in the nuclear power plant, while the relevant research is relatively less, especially for the aerodynamic characteristics of the tower. This paper researches the aerodynamic characteristics of the forced draft mechanical cooling tower based on the physical model test and optimizes the design of the cooling tower. The results show that the total resistance coefficient increases with the convergent section height of tower increasing, and decreases with the angle α between convergent section and horizontal line and installation height of fill decreasing. The wind velocity distribution coefficient has nothing to do with the convergent section height. The smaller the angle α is, the bigger the distribution coefficient is. The lower the height of the fill is, the smaller the wind velocity distribution coefficient is.