第 42 卷第 1 期
2014 年 1 月
河 海 大 学 学 报 ( 自 然 科 学 版 )
Journal of Hohai University(Natural Sciences)
Vol. 42 No. 1
Jan. 2014
DOI:10. 3876 / j. issn. 1000 1980. 2014. 01. 013
摇 摇 收稿日期: 2013 05 27
基金项目:国家自然科学基金 (51106042)
作者简介: 周大庆(1976—) ,男,浙江泰顺人,副教授,博士,主要从事水力机械设计与性能优化研究。 E鄄mail: zhoudaqing@ hhu. edu. cn
基于 VOF 模型的抽水蓄能电站全过流系统
水轮机工况数值模拟
周大庆,李摇 超,张蓝国
(河海大学能源与电气学院,江苏 南京摇 210098)
摘要: 为了更加全面地分析抽水蓄能电站水轮机工况的流动特性,建立包括引水隧洞、调压井、高
压管道、水泵水轮机以及尾水隧洞的全过流系统几何模型,采用两相流 VOF 模型对不同导叶开度
的水轮机工况进行三维湍流数值模拟,计算各过流部件的水力损失,并详细分析了机组段流场。 结
果表明:抽水蓄能电站的水力损失主要发生在机组段,而输水系统的水力损失相对较小,约占总水
力损失的 18郾 6% ;导叶开度不同从而引起叶片压力面与吸力面的压力差不同,这是导致转轮水力
损失不同的主要原因;尾水管内的流态与导叶开度有关,开度越小,在尾水管进口处越容易形成回
流,水力损失越大。
关键词: 全过流系统;导叶开度;水力损失;数值模拟;抽水蓄能电站;水泵水轮机组
中图分类号:TV743;TK734摇 文献标志码:A摇 摇 摇 文章编号:1000 1980(2014)01 0067 06
Numerical simulation of full flow system of
pumped storage power station under turbine conditions based on VOF model
ZHOU Daqing, LI Chao, ZHANG Languo
(College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China)
Abstract: In order to comprehensively investigate the flow characteristics at a pumped storage power station under
turbine conditions, we established a geometric model of the full flow system including the diversion tunnel, the
surge tank, the high鄄pressure pipes, the pump鄄turbine group, and the tailrace tunnel. Based on the VOF model,
we conducted three鄄dimensional numerical simulation of turbulent flow under turbine conditions with different guide
vane opening degrees, calculated the hydraulic loss of each flow part, and analyzed the flow field of the pump鄄
turbine unit in detail. The results show that the hydraulic loss mainly occurred in the pump鄄turbine unit of the
station, and it was small in the water transfer system, accounting for about 18郾 6% of total hydraulic loss. The
difference in the runner爷s hydraulic loss was mainly due to the pressure difference of the surface of two sides of the
blade caused by different guide vane opening degrees. The flow pattern of the tailrace tunnel was related to the
guide vane opening degree, and the smaller the degree of opening was, the more chance for the backflow to occur
in the draft tube, and the greater hydraulic loss.
Key words: full flow system; guide vane opening degree; hydraulic loss; numerical simulation;pumped storage
power station; pump鄄turbine group
水泵工况与水轮机工况是抽水蓄能电站最常见的两种相反的运行方式,并且水力设计通常以水轮机工
况进行校核
[1]
,因此进行水轮机工况的研究就显得十分必要。 杨琳等
[2]
通过对水泵水轮机组全流道三维湍
流数值模拟,分析了转轮各部件之间的关系,优化并改进了转轮设计;张梁等
[3]
对水泵水轮机的水轮机工况
的大流量区进行了数值模拟,并详细分析了大流量下转轮内部的流动特性,为水轮机工况大流量区域的数值
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