凝汽器循环水二次滤网后流动特性的研究  

Study on Flow Characteristics of Circulating Water through the Condenser Secondary Filter

作　　者：曹丽华[1] 邴阳洋 李勇[1] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012

出　　处：《汽轮机技术》2014年第6期432-435,共4页Turbine Technology

基　　金：吉林省科技发展计划资助项目(20140204040SF)

摘　　要：凝汽器循环水二次滤网后水流的均匀性对循环水入口水室内流场的影响很大。应用数值模拟方法,对加装不同开孔率的循环水二次滤网的整流特性进行研究。结果表明:不同开孔率的二次滤网对循环水流动特性的影响不同。开孔率为60%时,循环水流过二次滤网后,近网面处流动最平稳,产生的压降最小,且二次滤网后低速区的范围明显减小,循环水流场的均匀性系数大幅度提升,整流效果最佳。The uniformity of the circulating water flow through the condenser secondary filter has a huge effect on the flow field of condenser＇ s inlet chamber. A numerical simulation method was used to study on the rectification characteristics of different porous circulating water secondary filters. The results show that different porous secondary filters have different influences on the characteristics of circulating water flow field. When porosity reaches to 60% ,the circulating water flow is the steadiest near the net surface after passing through the secondary filter,also the pressure drop which the filter leaded to is the minimum, and the low speed area that the secondary filter caused reduces obviously, in which the circulation flow field uniformity coefficient increases significantly, and the rectifiable effect is the best.

关 键 词：凝汽器 二次滤网 开孔率 整流特性 数值模拟 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程]