Use of dispersing springboards to reduce near-bottom velocity in a toe basin
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It is noted that the load that develops under high near-bottom velocities should be consider when analyzing the loads on a toe-basin slab in the case of high-head hydroprojects. They may not only create significant forces against the surface of the slabs, but also give rise to the appearance of suspending forces, which act on blocks of the toe—basin slab of the apron. To reduce near-bottom velocities, it is recommended that a group of dispersing springboards with a double-curved surface be incorporated in the terminal section of the spillway. Numerical modeling of the operating regime of the basin indicates that a submerged hydraulic jump is formed here in the basin, while near-bottom velocities are reduced by more than a factor of two, and, consequently, a more than fourfold reduction occurs in the load.
- A. I. Efimanko and G. L. Rubinshtein, Spillway Structures at the Sayano-Shushenskaya HPP [in Russian], Izd. JSC “VNIIG im. B. E. Vedeneeva,” St. Petersburg (2008).
- R. R. Chugaev, Water-Development Works. Part 1. Spillway Dams [in Russian], Agropromizdat (1985).
- RF Pat. No. 2266364, A. M. Vasil’ev, A. I. Tishchenko, and S. M. Vasil’ev, “Springboard-splitter for cantilevered section of spillway, ” Byull. Izobret., No. 12 (2005).
- Rubinshtein, GL (2000) Piers-splitters for toe basin at Sayano-Shushenskaya HPP. Izv. VNIIG im. B. E. Vedeneeva 236: pp. 51-58
- RF Pat. No. 1749362, I. S. Merkur’ev and A. A. Belyakov, “Method of extinguishing flow energy,” Byull. Izobret. No. 27 (1992).
- Tursunov, AA (1962) Turbulent water flow at turns and dispersing springboards. Izv. VNIIG im. B. E. Vedeneeva 69: pp. 149-175
- Kh. I. Zairov, “Extinguishment of kinetic energy beyond spillway dam equipped with group of dispersing lips,” Izv. Vuzov. Énergetika, No. 3 (1966).
- Use of dispersing springboards to reduce near-bottom velocity in a toe basin
Power Technology and Engineering
Volume 46, Issue 2 , pp 113-115
- Cover Date
- Print ISSN
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- Springer US
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- energy extinguishment
- toe basin
- near-bottom velocity
- terminal section of spillway
- double-curved surface
- Industry Sectors