Hydraulic Modeling of High Unit Discharge Energy Dissipators

by David R. Moore, Univ of Manitoba, Winnipeg, Canada,
Donald H. Burn, Univ of Manitoba, Winnipeg, Canada,
Philip D. Wang, Univ of Manitoba, Winnipeg, Canada,
Dennis E. Lemke, Univ of Manitoba, Winnipeg, Canada,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The incorporation of an efficient and economical energy dissipation device is critical with respect to the safe operation of a high unit discharge spillway. The development and design of a high unit discharge energy dissipator usually involves physical hydraulic modeling. This enables the designer to assess the operational viability of the proposed design while analyzing its performance with respect to the hydraulic interaction of the dissipator with the surrounding structure. To fully assess a high unit discharge energy dissipator, it is necessary to examine several variables including dynamic pressure fluctuations, cavitation likelihood, specific energy dissipation efficiency, sweep-out resistance capability, the velocity distribution downstream of the dissipator, and the relationship of the hydraulic jump height curve to the tailwater depth curve. This paper describes a methodology by which one may acquire and manage data with regards to a physical Froude model analysis of a high unit discharge energy dissipation device.

Subject Headings: Hydraulic models | Energy dissipation | Water discharge | Physical models | Hydraulic design | Hydraulic pressure | Dynamic pressure

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