Resonance investigation of pump-turbine during startup process

被引：31
作者：
He, L. Y. [1 ]
Wang, Z. W. [2 ]
Kurosawa, S. [3 ]
Nakahara, Y. [4 ]
机构：
[1] China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China
[2] Tsinghua Univ, Dept Thermal Engn, Inst Fluid Machinery & Fluid Engn, State Key Lab Hydro Sci & Engn, Beijing 100084, Peoples R China
[3] Toshiba Co Ltd, Power & Ind Syst R&D Center, Rotating Machine Technol R&D Dept, Yokohama, Kanagawa 2300034, Japan
[4] Toshiba Co Ltd, Hydroelect Power Engn Dept, Saiwai Ku, Kawasaki, Kanagawa 2128585, Japan
来源：
27TH IAHR SYMPOSIUM ON HYDRAULIC MACHINERY AND SYSTEMS (IAHR 2014), PTS 1-7 | 2014年 / 22卷
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1088/1755-1315/22/3/032024
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The causes of resonance of a certain model pump-turbine unit during startup process were investigated in this article. A three-dimensional full flow path analysis model which contains spiral case, stay vanes, guide vanes, runner, gaps outside the runner crown and band, and draft tube was constructed. The transient hydraulic excitation force of full flow path was analyzed under five conditions near the resonance region. Based on one-way fluid- structure interaction (FSI) analysis model, the dynamic stress characteristics of the pump-turbine runner was investigated. The results of pressure pulsation, vibration mode and dynamic stress obtained from simulation were consistent with the test results. The study indicated that the hydraulic excitation frequency (Z(g)*f(n)) Hz due to rotor-stator interference corresponding to the natural frequency of 2ND+4ND runner mode is the main cause of resonance. The relationship among pressure pulsation, vibration mode and dynamic stress was discussed in this paper. The results revealed the underlying causes of the resonance phenomenon.
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页数：8
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