Numerical investigation on the cluster effect of an array of axial flow fans for air-cooled condensers in a power plant  

作　　者：YANG LiJun DU XiaoZe ZHANG Hui YANG YongPing 

机构地区：[1]Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education,School of Energy Power and Mecha-nical Engineering,North China Electric Power University,Beijing 102206,China

出　　处：《Chinese Science Bulletin》2011年第21期2272-2280,共9页

基　　金：supported by the National Basic Research Program of China (2009CB219804);the National Key Technology R&D Program of China (2011BAA04B02)

摘　　要：The aerodynamic behavior of tens of axial flow fans incorporated with air-cooled condensers in a power plant is different from that of an individual fan.Investigation of the aerodynamic characteristics of axial flow fan array benefits its design optimization and running regulation.Based on a representative 2600 MW direct-dry cooling power plant,the flow rate of each fan and the overall flow rate of the fan array are obtained in the absence of ambient wind and at various wind speeds and directions,using CFD simulation.The cluster factor of each fan and the average cluster factor of the fan array are calculated and analyzed.Results show that the cluster factors are different from each other and that the cluster effect with ambient wind is significantly different from the cluster effect with no wind.The fan at the periphery of the array or upwind of the ambient wind generally has a small cluster factor.The average cluster factor of the array decreases with the increasing wind speeds and also varies widely with wind direction.The cluster effect of the axial flow fan array can be applied to optimize the design and operation of air-cooled condensers in a power plant.The aerodynamic behavior of tens of axial flow fans incorporated with air-cooled condensers in a power plant is different from that of an individual fan.Investigation of the aerodynamic characteristics of axial flow fan array benefits its design optimization and running regulation.Based on a representative 2600 MW direct-dry cooling power plant,the flow rate of each fan and the overall flow rate of the fan array are obtained in the absence of ambient wind and at various wind speeds and directions,using CFD simulation.The cluster factor of each fan and the average cluster factor of the fan array are calculated and analyzed.Results show that the cluster factors are different from each other and that the cluster effect with ambient wind is significantly different from the cluster effect with no wind.The fan at the periphery of the array or upwind of the ambient wind generally has a small cluster factor.The average cluster factor of the array decreases with the increasing wind speeds and also varies widely with wind direction.The cluster effect of the axial flow fan array can be applied to optimize the design and operation of air-cooled condensers in a power plant.

关 键 词：风冷冷凝器 集群效应 轴流风机 阵列 电厂 数值研究 空气动力学特性 空气动力特性 

分 类 号：P621[天文地球—地质矿产勘探]