Conclusions
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1.
A considerable cavitation wear of the runner blades at the Bratsk hydroelectric power plant occurred as the result of operating the hydraulic turbines under conditions falling outside the design range and due to distortion of the blade profile caused by electrode surfacing on a large scale carried out during repairs.
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2.
The most effective method of reducing cavitation wear was the admission of air to the cavitation zones on the runner surface.
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3.
Air admission to the cavitation zones does not affect the power generation indices of the hydraulic turbine.
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Literature Cited
N. I. Pylaev and Yu. U. Édel' Cavitation in Hydraulic Turbines [in Russian] Mashinostroenie, Moscow-Leningrad (1974).
N. I. Pylaev and A. A. Sotnikov, “Air admission as a means of reducing cavitation erosion”, Énergomashinostroenie, No. 7 (1973).
Additional information
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 2, pp. 23–25, February, 1975.
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Glukhov, I.S., Pylaev, N.I. Cavitation wear in hydraulic turbines at the Bratsk hydroelectric power plant. Hydrotechnical Construction 9, 141–145 (1975). https://doi.org/10.1007/BF02378451
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DOI: https://doi.org/10.1007/BF02378451