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| 电厂直接空冷系统热风回流的数值模拟 | |
| 引用本文： | 段会申,刘沛清,赵万里. 电厂直接空冷系统热风回流的数值模拟[J]. 动力工程, 2008, 28(3): 395-399 |
| 作者姓名： | 段会申 刘沛清 赵万里 |
| 作者单位： | 北京航空航天大学,航空科学与工程学院,北京,100083 |
| 摘 要： | 阐述了热风回流的产生机理及热回流率的概念,并对汽轮机空冷系统周围不同环境风场进行了数值模拟.通过对计算结果的分析,找出了空冷系统的不利风向,给出了热回流率随风速的变化规律,并提出了减少热风回流的措施:适当增加空冷平台上部四周风墙高度,或加快空冷平台边缘风机的转速. |
| 关 键 词： | 能源与动力工程 汽轮机 直接空冷系统 热回流率 空冷凝汽器 汽轮机背压 |
| 文章编号： | 1000-6761(2008)03-0395-05 |
| 修稿时间： | 2007-08-03 |
Numerical Simulation on Hot Wind Recirculation for Direct Air Cooled System |
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| DUAN Hui-shen,LIU Pei-qing,ZHAO Wan-li. Numerical Simulation on Hot Wind Recirculation for Direct Air Cooled System[J]. Power Engineering, 2008, 28(3): 395-399 | |
| Authors: | DUAN Hui-shen LIU Pei-qing ZHAO Wan-li |
| Abstract: | The mechanism of the generation for hot air recirculation and its conception was expounded.The environmental wind fields with different conditions around direct air cooled system of a steam turbine were numerically simulated.The unfavorable wind to the air cooled system was found out and the regulation of hot wind recirculation ratio varied with the wind velocity was presented by analyzing the calculations.Three measures are developed to reduce the hot air recirculation,such as to increase the upper wind-wall height around air cooled platform,to accelerate the rotating speed of the fans near the edge of the air cooled platform,and etc.. |
| Keywords: | energy and power engineering steam turbine direct air cooled system thermal recirculation ratio air cooled condenser steam turbine's back pressure |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |