基于数值方法确定冷却塔雨区水滴粒径分布  

The Numerical Analysis of Water Droplets Diameter in the Rain Zone of Cooling Tower

作　　者：王晨晨 刘江 王明勇[2] 姚秀平 赵秀锋 WANG Chen-chen;LIU Jiang;WANG Ming-yong;YAO Xiu-ping;ZHAO Xiu-feng(College of Energy ＆ Mechanical Engineering？ Shanghai University of Electric Power？ Shanghai 200090？ China;Xi＇an Thermal Power Research Institute Company Limited？ Xi＇an 710054？ China;Baowu Steel Group Environment ＆ Resources Technology Company Limited？ Shanghai 201999？ China)

机构地区：[1]上海电力学院能源与机械工程学院,上海200090 [2]西安热工研究院有限公司,西安710054 [3]宝武集团环境资源科技有限公司,上海201999

出　　处：《汽轮机技术》2018年第5期353-356,共4页Turbine Technology

基　　金：上海市教育委员会优青项目(项目编号:ZZsdl15081)

摘　　要：以某电厂逆流式自然通风冷却塔为研究对象,采用数值模拟方法对雨区水滴粒径大小的选取进行探究。针对过往研究中雨区水滴采用单一粒径不能同时兼顾热力特性和阻力特性准确性的不足,提出采用高斯分布粒径来实现DPM模型的数值模拟。通过将单一粒径、均匀分布粒径和高斯分布粒径3种设置条件下的数值模拟结果与冷却塔实测工况进行对比,结果表明粒径呈高斯分布的数值模拟能够更好的反映实测雨区的热力和阻力特性。A numerical simulation method is used to explore the diameter of water droplets in the rain zone of a natural draft counter flow wet cooling tower. The Gauss distribution is proposed to guide into the diameter of water droplets in the Discrete Phase Model because the single particle size of the water droplets in the rain zone can not simultaneously satisfy the computational accuracy of the thermal performance and the drag characteristic of the cooling tower. By comparing the numerical simulation results of the single particle size,the Uniform distribution and the Gauss distribution with the field condition of the cooling tower,the Gauss distribution can better reflect the thermal performance and the drag characteristic of the rain zone.

关 键 词：冷却塔 雨区 数值模拟 高斯分布 均匀分布 

分 类 号：TK124[动力工程及工程热物理—工程热物理]