STUDY ON REVERSE WATER HAMMER OF THE KAPLAN TURBINE

摘要：

The phenomenon of reverse water hammer will occur when the guide vane is closed rapidly in load rejection transient of the Kaplan turbine. For researching this problem, this article uses the experimental and theory analysis method to study the section on which the reverse water hammer appeared and the critical pressure of water separation. The results indicate that: the section on which the reverse water hammer occurred is behind the guide vane, not the draft tube entrance. In load rejection transient, the pressure of the draft tube entrance is increasing, but the pressure of the section behind the guide vane is decreasing, the minimum pressure appears at the guide vane outlet. The author measured the critical cavitation pressure for the water samples of Wanjiazhai hydropower station. The experiment results show that: the critical cavitation pressure is much bigger than 0.24m which is the pure water vapor pressure under the normal temperature. Moreover, the critical cavitation pressure is increasing along with the increase of sand quantity. So, we must use the actual cavitation pressure measured for the water sample in hydropower plant to judge whether the phenomenon of reverse water hammer will occur.

关键词： reverse water hammer load rejection transient critical pressure kaplan turbine

作者: Yanze Liu Jinshi Chang

作者单位: China Agricultural University, No.17 Qinghua Dongin, Beijing 100083, China China Agricultural University, No.17 Qinghua Donglu, Beijing 100083, China

会议类型: 国际会议

会议名称: 第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)

会议地点: 南京

会议语种:英文

页码: 2208-2213

在线出版日期: 2008-10-20（万方平台首次上网日期，不代表论文的发表时间）