精品文档---下载后可任意编辑摘要：鼓风式机械通风冷却塔常用于核电厂的重要厂用水系统，但相关设计法律规范并没有给出冷却塔的空气动力特性计算公式。本文采纳 Fluent 软件对鼓风式机械通风冷却塔的空气动力进行了数值模拟计算，对冷却塔的设计布置进行了优化，分析总结给出了冷却塔阻力计算公式。结果表明，填料安装位置对鼓风式机械通风冷却塔整塔阻力影响不大，但会影响填料断面风速分布均匀性，填料安装高度越低，风速分布越均匀；出口收缩段的高度越高，整塔阻力越小，风速分布越均匀；出口收缩段与水平的夹角越大，整塔阻力系数越小，但变化趋势不明显，收缩角基本不影响填料断面风速分布均匀性。关键词：鼓风式冷却塔；塔型；阻力系数；风速均匀性Abstract:The forced draft mechanical cooling tower is always used in a nuclear power plant, while the relevant design specificationshave notformula about the aerodynamic characteristics of cooling tower.This paper uses FLUENT software to simulate and study the aerodynamic characteristics of the forced draft mechanical cooling tower,and optimize the design of the cooling tower,and analysis to summarize the cooling tower resistance calculative formula.The results show that the height of the fill has little effectsonthe whole tower resistance coefficient,but it influences the wind velocity distribution uniformity of the fill section, the lower the position is, themore uniform the wind velocity distributionis; the convergent section height is higher, the whole tower resistance is smaller and the wind velocity distribution is more uniform.The angle between convergent section and horizon is bigger, the whole tower resistance is smaller,while this trend is not obvious,it does not affectthe wind velocity distribution uniformity on the fill section.Keywords:the forced draft mechanical cooling tower,tower shape, resistance coefficient, wind velocity distribution uniformity1 讨论背景内陆核电厂的重要厂用水的水量不大，...
