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Flow aeration on the operating spillway at the Sayano-Shushenskoe hydroelectric station

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  • At the Construction Projects of the Five-Year Plan
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Hydrotechnical Construction Aims and scope

Conclusion

Protection of the Sayano-Shushenskoe spillway from cavitation erosion is achieved by an aeration sill behind the radial gate and an aeration groove at elevation 35.25 m. The air content in the near-bottom layer (without consideration of its increase in the prototype) will be at least 6–8%, which is sufficient to eliminate cavitation erosion. As a consequence it seems possible to reduce the grade of concrete in the spillway with a strength of 400 kgf/ cm2 to grade 300 kgf/cm2. Protection of the upper concrete-hauling trestle from splashes is provided by deflectors.

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Literature cited

  1. R. S. Gal'perin, A. T. Kaveshnikov, I. S. Novikova, and G. N. Tsedrov, “Study of cavitation erosion on elements of hydraulic structures,” in: Transactions of the Joint Conference on Hydraulic Engineering [in Russian], No. 100 (1976).

  2. V. M. Semenkov, “Measures for preventing cavitation erosion on spillways of high dams,” in: Transactions of the Joint Conference on Hydraulic Engineering. Hydraulics of High-Head Spillways [in Russian] (1975).

  3. R. S. Gal'perin and R. I. Nazarova, “Protection of the spillway surface from cavitation erosion by aeration of the boundary layer at the Sayan hydroelectric station,” in: Transactions of the Joint Conferences on Hydraulic Engineering. Hydraulics of High-Head Spillways [in Russian] (1975).

  4. V. P. Troitskii, “Electrical instruments for measuring the air content in aerated flows,” Izv. VNIIG,82 (1966).

  5. N. P. Rozanov, P. E. Lysenko, and A. T. Kaveshnikov, Recommendations on Consideration of Cavitation in the Design of Spillways [in Russian], VNIIG, P. 38–75 (1976).

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Authors
  1. A. T. Kaveshnikov
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  2. L. D. Lentyaev
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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 1, pp. 10–14, January, 1978.

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Kaveshnikov, A.T., Lentyaev, L.D. Flow aeration on the operating spillway at the Sayano-Shushenskoe hydroelectric station. Hydrotechnical Construction 12, 12–19 (1978). https://doi.org/10.1007/BF02304366

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  • DOI: https://doi.org/10.1007/BF02304366

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