圆台形空冷单元导流装置优化数值模拟研究  

Numerical Simulation Study of Deflector Optimization for the Frustum Cone-like Air Cooled Unit

作　　者：程友良[1] 张宁[1] CHENG You-liang;ZHANG Ning(School of Energy and Power Engineering,Noah China Electric Power University, Baoding 071003, China)

机构地区：[1]华北电力大学能源与动力工程学院,保定071003

出　　处：《汽轮机技术》2018年第3期197-200,228,共5页Turbine Technology

基　　金：中央高校基本科研业务费专项基金(2016MS154)

摘　　要：在圆台形空冷单元添加引风环的基础上,为减少空气回流现象以保证最大化地提高空气利用效率,在空冷单元内部添加凹槽和凸槽导流板,利用Fluent软件对导流板的结构进行优化研究,通过分析其温度场和流线分布的情况,得到换热效果最佳的导流板结构,并对不同空冷单元的凝汽器背压和汽轮机煤耗进行计算、分析与比较。研究表明:添加导流板后,空气回流现象得到明显改善;两种导流板均能提高换热效果;换热效果最佳的是凹槽导流板。On the basis of the frustum cone-like with induced air ring,in order to reduce air backflow,ensure the maximum efficiency of air utilization,a groove and a convex groove deflector are added inside the air cooled unit. Fluent software is used to optimize the structure of the deflector,by analyzing temperature distribution and streamlined diagram,the deflector structure with the best heat transfer effect is obtained. And the analysis and comparison of condenser back pressure and coal consumption are also given in various air coolied units. The results show that the air backflow phenomenon is obviously improved after adding the deflector,the two kinds of deflectors can enhance the heat transfer effect,the best heat transfer effect is the groove deflector.

关 键 词：空冷单元 回流 凹槽导流板 凸槽导流板 数值模拟 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]