Open AccessSpecial Pressure Fluctuation analyse of the pump turbine
Author(s) -
D M Liu,
Baolei Geng,
Hongyan He,
Zheng Jie,
W C Liu,
Quanwei Liang,
Yaomin Zhao
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/774/1/012139
Subject(s) - turbine , impeller , power (physics) , draft tube , rotational speed , range (aeronautics) , water turbine , stability (learning theory) , amplitude , power station , engineering , control theory (sociology) , environmental science , mechanics , mechanical engineering , electrical engineering , computer science , physics , aerospace engineering , optics , control (management) , quantum mechanics , artificial intelligence , machine learning
In the 13th five-year planning, the pumped storage power stations have speeding up. A large number of pumped storage power stations will been installed. The current development of modern pump storage plants aims towards a higher flexibility and stability in operation, an extended operation range of the hydraulic machine. The stability of pump turbine has been paid more and more attention in the industry. Hydraulic pressure pulsation is very important for the stability of pump turbine. For pump turbine, the pressure pulsation on vane-less area between guide vane and runner blade is very important. It is the fundamental source of unit stability and the direct embodiment of rotational and static interference. This paper analyses the special pressure pulsation in the vane-less area of pump turbine, focusing on the pressure pulsation of one time rotating frequency and two times rotating frequency. The amplitude and frequency of pressure pulsation and the source of pressure pulsation induced by this special frequency are analysed and detected from the perspective of numerical and model test. By optimizing the design of the runner, the pressure pulsation of that particular frequency is eliminated.