Science China Technological Sciences

, Volume 61, Issue 4, pp 604–611 | Cite as

Experimental investigations of a prototype reversible pump turbine in generating mode with water head variations

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Abstract

Influences of water head variations on the performances of a prototype reversible pump turbine are experimentally studied in generating mode within a wide range of load conditions (from 25% to 96% of the rated power). The pressure fluctuations of the reversible pump turbine at three different water heads (with non-dimensional values being 0.48, 0.71 and 0.90) are measured and compared based on the pressure data recorded in the whole flow passage of the turbine. Furthermore, effects of monitoring points and load variations on the impeller-induced unstable behavior (e.g. blade passing frequency and its harmonics) are quantitatively discussed. Our findings reveal that water head variations play a significant role on the pressure fluctuations and their propagation mechanisms inside the reversible pump turbine.

Keywords

reversible pump turbine pumped hydro energy storage pressure fluctuation generating mode prototype part load mode 

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.China Institute of Water Resources and Hydropower ResearchBeijingChina
  2. 2.Key Laboratory of Condition Monitoring and Control for Power Plant Equipment (Ministry of Education), School of Energy, Power and Mechanical EngineeringNorth China Electric Power UniversityBeijingChina
  3. 3.Key Laboratory of Fluid and Power Machinery (Xihua University), Ministry of EducationChengduChina

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