Cavitation in High-Head Conduit Control Dissipators

by John F. Ripken, Prof. of Hydromechanics; St. Anthony Falls Hydr. Lab., Dept. of Civ. and Mineral Engrg., Univ. of Minnesota, Minneapolis, MN,
Norio Hayakawa, Dept. of Civ. Engrg., Univ. of Waterloo, Waterloo, Ontario, Canada,

Serial Information: Journal of the Hydraulics Division, 1972, Vol. 98, Issue 1, Pg. 239-256

Document Type: Journal Paper


The wasting of water from high-head hydraulic structures through a closed conduit requires an economical control and energy dissipator device which will safely contain the potentially destructive cavitation-prone flow. Hydraulic design criteria for a valve-orifice-chamber type of control dissipator are reviewed with regard to the influence that cavitation has on flow capacity, vibration, noise, and erosion. Orifices modified with peripheral devices to break up the continuity of the troublesome vortex rings showed substantial performance benefits when tested.

Subject Headings: Cavitation | Conduits | Structural safety | Hydraulic design | Economic factors | Structural control | Hydro power | Energy dissipation

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