Conclusions
Model investigations of the hydraulic operating conditions of a vortical tunnel spillway with a tangential vortex generator indicated that:
a trend toward leveling of the core axis is observed with increasing geometric parameter A of the vortex generator both with and without air fed into the conduit;
insignificant underflooding of the outlet section of the tunnel (their difference for all regimes does not exceed 1.7%) exerts a minor influence on the carrying capacity of the spillway; here, underflooding even increases the flow rate of the spillway in the absence of air when A=0.925 and 1.245;
an air feed also has little effect on the carrying capacity of the structure, with the exception of the layout containing a vortex generator with A=0.6 (Δ=6.04% when A=0.6, Δ=0% when A=0.925, and an air feed increases the flow rate of the spillway by Δ=1.86% when A=1.245);
significant vacuums, the absolute values of which drop rapidly from Hco=−2.7 m to Hco=−1 m with increasing A, are observed for regimes with no air fed to the core;
air fed into the core sharply lowers the vacuum in the latter, and its value approaches zero;
the center of the core at the end of the vortex generator shifts toward the axis of the conduit with increasing parameter A; and,
regimes with no air fed to the core are most favorable in terms of pressure distribution on the wall of the conduit.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
Hydraulic Calculations for Spillway Water-Development Works: Reference Manual [in Russian], Énergoatomizdat, Moscow (1988).
B. A. Zhaivotovskii, Yu. B. Mitbreit, N. P. Rozanov, N. N. Rozanova, N. V. Khanov, and A. M. Fedorkov, “Hydraulic research on a vortical spillway with an inclined shaft,” in: Materials Presented at the Scientific-Technical Conference “Hydraulics of Water-Development Works-92,” Collection of the B. E. Vedeneev All-Russian Scientific-Research Institute of Hydraulic Engineering [in Russian] (1994).
V. V. Volshanik, A. L. Zuikov, and A. P. Mordasov, Swirled Flows in Water-Development Works [in Russian], Énergoatomizdat, Moscow (1990).
Investigation of the Vortical Shaft Spillway at the Tel’mamsk Hydraulic Facility with a Tangential Vortex Generator [in Russian], MGMI, Moscow (1991).
M. V. Khanov, “Vortical spillways with an inclined shaft and tangential vortex generator,” Dissertation for Candidate of Technical Sciences, Moscow (1994).
N. P. Rozanov, N. V. Khanov, and A. M. Fedorkov, “Measures taken to improve the hydraulic operating conditions of the vortical shaft spillway at the Tel’mamsk hydraulic facility,” Gidrotekh. Stroit., No. 4 (1995).
N. P. Rozanov and A. M. Fedorkov, “Hydraulic and cavitation investigations of swirling apparatus for the vortical spillway of the Rogun hydraulic facility,” in: Refinement of Water-Development Works [in Russian], MGMI, Moscow (1991).
M. A. Galant, B. A. Zhivtovskii, I. S. Novikova, V. B. Rodionov, and N. N. Rozanova, “Characteristic features of vortical tunnel spillways and their hydraulic operating conditions,” Gidrotekh. Stroit., No. 9 (1995).
Additional information
Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 5, pp. 15–19, May, 1998.
Rights and permissions
About this article
Cite this article
Khanov, N.V. Hydraulic performance characteristics of a vortical spillway with a tangential vortex generator in the flow. Hydrotechnical Construction 32, 253–258 (1998). https://doi.org/10.1007/BF02918697
Issue Date:
DOI: https://doi.org/10.1007/BF02918697