第五代福哥型间接空冷散热器流动换热性能数值研究  

Numerical Study on Flow and Heat Transfer Characteristics of the Fifth Generation of Forgo-type Heat Exchangers

作　　者：张垚鹏 蒋以山[1] 赵欣[1] Zhang Yao-peng;Jiang Yi-shan;Zhao Xin(Naval Submarine Academy of PLA,Shandong Qingdao 266000)

机构地区：[1]海军潜艇学院,山东青岛266000

出　　处：《电子质量》2022年第2期113-118,共6页Electronics Quality

摘　　要：在我国北方干旱地区的火力发电厂中,间接空冷系统由于其优越的节水性能得到了广泛应用。第五代福哥型间接空冷散热器(下文福哥型散热器亦指此)作为一种主要的空冷散热器型号,研究其流动传热特性,对于电站间接空冷系统的选型及高效运行具有重要意义。该文采用数值模拟的方法,计算获得了福哥型散热器冷却空气流动阻力和平均对流换热系数随迎面风速的变化关系。通过与同尺寸、没有开扰流孔散热器翅片管束的流动换热数据进行比较,结果表明:随着入口风速的不断增加,两种散热器翅片管束的空气流动压降和对流换热系数逐渐上升,摩擦因子则随之降低。空气在通过福哥型散热器时,扰流孔处的流动边界层和热边界层都遭到破坏,在增大流动损失的同时,也使传热得到显著强化。当来流风速uf为5m/s,Re为4800时,福哥型散热器翅片管束的综合性能达到最优。The indirect air cooling system has been widely used in the thermal power plants in the arid areas of northern China. The fifth generation of Forgo-type heat exchanger(hereinafter refer to this type of Forgo-type heat exchanger) as a main type of air heat exchangers, to study the flow and heat transfer characteristics, is of great significance for the selection of power plant indirect dry cooling system and efficient operation. In this paper, the numerical simulation method is used to calculate the relationship between the cooling air flow resistance and the average convective heat transfer coefficient. Compared with the same size, without interrupted holes heat exchanger fin tube bundle heat flow data, the results show that with the increase of wind speed,the air flow pressure drop and convective heat transfer coefficient of the two kinds of finned tube bundles are gradually increased, and the friction factor decreases. When the air passes through the Forgo-type heat exchanger, the flow boundary layer and the thermal boundary layer are destroyed, the flow loss is increased, and the heat transfer is enhanced significantly. When the incoming flow velocity ufis 5 m/s, Re is 4800, the compre hensive performance of the fin tube bundle is optimal.

关 键 词：第五代福哥型间接空冷散热器 间接空冷系统 翅片管束 扰流孔 流动传热特性 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]