| 直接空冷单元流动换热特性数值研究 |
| |
| 引用本文： | 李书营,李建龙,何雪梅,王秀清. 直接空冷单元流动换热特性数值研究[J]. 汽轮机技术, 2011, 53(3) |
| |
| 作者姓名： | 李书营 李建龙 何雪梅 王秀清 |
| |
| 作者单位： | 1. 郑州铁路职业技术学院机车,郑州,450052
2. 郑州航空工业管理学院,郑州,450052 |
| |
| 摘 要： | 对A型直接空冷单元流动换热特性进行了数值研究,分析了环境风速、风向、风温、平台高度等对空冷单元流动换热特性的影响。计算结果表明:环境侧风通过两方面影响空冷单元的性能,水平分速度严重影响通风量在散热器上的分配均匀性,垂直分速度严重影响风机的通风量。随着环境风速的增大,散热器的通风量减小,散热器温度升高,热回风率增加,风机压头有效利用系数降低;在同样环境风速下,Y向风是更不利的风向,应尽量避免;环境温度增加一方面提高了空冷单元的进风温度,另一方面减少了风机的通风量,使流动和换热恶化;在所研究的平台高度内,平台高度对空冷单元的流动和换热影响不大。研究结果可为空冷凝汽器的运行及优化设计提供参考。
|
| 关 键 词： | 空冷单元 流场特性 换热特性 数值模拟 回流率 |
Numerical Investigation on the Heat Transfer and Fluid Flow of Direct Air-cooled Condenser Unit |
| |
| LI Shu-ying,LI Jian-long,HE Xue-mei,WANG Xiu-qing. Numerical Investigation on the Heat Transfer and Fluid Flow of Direct Air-cooled Condenser Unit[J]. Turbine Technology, 2011, 53(3) |
| |
| Authors: | LI Shu-ying LI Jian-long HE Xue-mei WANG Xiu-qing |
| |
| Affiliation: | LI Shu-ying1,LI Jian-long1,HE Xue-mei2,WANG Xiu-qing1(1 Zhengzhou railway vocational technical college,Zhengzhou 450052,China,2 Zhengzhou institute of aeronautical technique industry management,China) |
| |
| Abstract: | The flow characteristics of A shape direct air-cooled condenser unit has been investigated numerically.And the five factors which are the crosswind velocity,platform height,environment temperature,windbreak height and the angle of incident flow are analyzed.The results indicate that the crosswind velocity and environment temperature increasing depress the mass flow rate through the radiator,and also decrease the mass flow rate of fan;and the effect of platform height is slight;the suction capacity of fan is... |
| |
| Keywords: | direct air cool condenser unit flow characteristics numerical simulation air recycle ratio |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
