Analysis of Internal Flow Characteristics of a Startup Pump Turbine at the Lowest Head under No-Load Conditions
Analysis of Internal Flow Characteristics of a Startup Pump Turbine at the Lowest Head under No-Load Conditions
复制标题
空载启动水泵水轮机最低水头内部流动特性分析
DOI：
10.3390/jmse9121360
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发表时间：
2021-12
影响因子：
2.9
通讯作者：
Yang Chunan
中科院分区：
文献类型：
--
作者：
Wang Wei;Wang Xi;Wang Zhengwei;Ni Mabing;Yang Chunan
The instability of the no-load working condition of the pump turbine directly affects the grid connection of the unit, and will cause vibration and damage to the components of the unit in severe cases. In this paper, a three-dimensional full flow numerical model including the runner gap and the pressure-balance pipe was established. The method SST k-ω model was used to predict the internal flow characteristics of the pump turbine. The pressure pulsation of the runner under different operating conditions during the no-load process was compared. Because the rotation speed, flow rate, and guide vane opening of the unit change in a small range during the no-load process, the pressure pulsation characteristics of the runner are basically the same. Therefore, a working condition was selected to analyze the transient characteristics of the flow field, and it was found that there was a high-speed ring in the vaneless zone, and a stable channel vortex was generated in the runner flow passage. Analyzing the axial water thrust of each part of the runner, it was found that the axial water thrust of the runner gap was much larger than the axial water thrust of the runner blades, and it changed with time periodically. It was affected by rotor stator interaction. The main frequency was expressed as a multiple of the number of guide vanes, that is, vanes passing frequency, 22fn. During the entire no-load process, the axial water thrust of the runner changed slowly with time and fluctuated slightly.
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DOI：
10.1088/1755-1315/22/3/032046
发表时间：
2014-03
期刊：
IOP Conference Series: Earth and Environmental Science
影响因子：
--
作者：
C. Gentner;M. Sallaberger;C. Widmer;B. J. Bobach;H. Jaberg;Jürgen Schiffer;Florian Senn;M. Guggenberger
通讯作者：
C. Gentner;M. Sallaberger;C. Widmer;B. J. Bobach;H. Jaberg;Jürgen Schiffer;Florian Senn;M. Guggenberger
影响因子：
2.3
作者：
Zhongjie Li;H. Bi;B. Karney;Zhengwei Wang;Ze Yao
通讯作者：
Zhongjie Li;H. Bi;B. Karney;Zhengwei Wang;Ze Yao
可逆水泵水轮机旋转失速研究进展
DOI：
10.1177/0954406216640579
发表时间：
2017-04
期刊：
PImechEC
影响因子：
--
作者：
Yuning Zhang;Yuning Zhang;Yulin Wu
通讯作者：
Yulin Wu
影响因子：
1.6
作者：
Xiaolong Fu;Deyou Li;Hongjie Wang;Guanghui Zhang;Zhenggui Li;Xianzhu Wei
通讯作者：
Xiaolong Fu;Deyou Li;Hongjie Wang;Guanghui Zhang;Zhenggui Li;Xianzhu Wei
DOI：
10.1115/1.4023647
发表时间：
2013-05
期刊：
Journal of fluids engineering
影响因子：
--
作者：
Hui Sun;R. Xiao;Weichao Liu;Fujun Wang
通讯作者：
Hui Sun;R. Xiao;Weichao Liu;Fujun Wang