Improving Concrete Containment Structures Associated with Fixed-Cone Valves
B. Skyler Buck, Michael C. Johnson, Zachary B. Sharp
DOI: 10.4236/eng.2011.35051   PDF   HTML     6,086 Downloads   9,981 Views  


Fixed-Cone valves are often used to dissipate energy and regulate flow at the low level outlet works of dams. Fixed-Cone valves, also known as Howell-Bunger valves, create an expanding conical jet allowing the energy of the water to dissipate over a large area. However, in many applications constructing the large stilling basin necessary for these valves is either not possible or not feasible. In order to reduce the relative size of the stilling basin, hoods or concrete containment structures have been used in conjunction with Fixed-Cone valves. This paper discusses the use of baffles in concrete containment structures in order to dissipate energy in a considerably confined space. It was determined that using baffles, in place of a deflector ring and end sill (Used in traditional containment structures.), significantly improves the function of containment structures by reducing downstream flow velocities and improving flow patterns and stability. This information will be useful to engineers allowing them to minimize scour and erosion associated with concrete containment structures.

Share and Cite:

B. Buck, M. Johnson and Z. Sharp, "Improving Concrete Containment Structures Associated with Fixed-Cone Valves," Engineering, Vol. 3 No. 5, 2011, pp. 445-451. doi: 10.4236/eng.2011.35051.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] G. L. Beichley, “Hydraulic Model Studies of Scoggins Dam Fishtrap Aeration and Supply Structure,” USBR REC-ERC-72-27, 1972.
[2] M. C. Johnson and R. Dham, “Innovative Energy-Dissipating Hood,” Journal of Hydraulic Engineering, Vol. 138, No. 8, 2006, pp. 759-764.doi:10.1061/(ASCE)0733-9429(2006)132:8(759)
[3] T. E. Helper and H. W. Peck, (1989). “Energy Dissipa-tion Structure for Fixed-Cone Valves,” Proceedings of the 1989 National Conference on Hydraulic Engineering, New Orleans, 14-18 August 1989, pp. 956-961.
[4] D. Colgate, “Hydraulic Model Studies of the Low-Level Outlet Works, LG-2 Devel-opment. Quebec, Canada,” USBR REC-ERC-74-3, 1974.
[5] G. L. Beichley, “Hydraulic Model Studies of Port-age Mountain Low Level Outlet Works,” USBR Report No Hyd-508, 1966.
[6] G. L. Beichley, “Hydraulic model studies of an Energy Dissipator for a Fixed-Cone Valve at the Ute Dam Outlet Works,” USBR REC-OCE-70-11, 1970.
[7] Y. Yin, D. Cui and X. Hu, “Study of Wear Performance of Hydraulic Concrete under High Speed Clear Water Jet,” Chinese Science Abstracts, Vol. 6, No. 9, 2000, pp. 1181-1182.

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.