鼓风式机械通风冷却塔空气动力特性数值模拟研究

Numerical simulation on the aerodynamic characteristics of the forced draft mechanical cooling tower

冷却塔的空气动力特性是确保冷却塔高效的设计关键。本文采用Fluent软件,对内陆核电重要厂用水系统鼓风式机械通风冷却塔在不同塔型条件下的空气动力特性进行了数值模拟计算,获得了冷却塔塔型与冷却塔阻力及填料断面风速分布均匀性的关系。计算结果表明,填料安装高度对鼓风式机械通风冷却塔整塔阻力影响不大,但会影响填料断面上风速分布均匀性,填料安装高度越低,风速分布越均匀,填料阻力系数越小影响越明显;出口收缩段的高度越高,整塔阻力越小,风速分布越均匀。

With the Fluent-3D, this paper conducts the simulation and calculation of the aerodynamic char- acteristics of the forced draft mechanical cooling tower in the important water system of the inland nuclear power plant, and obtains the relationship between the tower shape and the resistance. The results show that the height of the fill does not much affect the resistance of the tower,but it affects the velocity distribution on the fill section. The lower the fill height is, the more uniform the velocity distribution is. The higher the height of the convergent section of the outlet is, the less the resistance is, and the more uniform the velocity distribution is.