Hydraulic Model Studies of the Teton Canal Outlet Works Energy Dissipator,

摘要

Studies were made on a 1:5.66scale model of a single jet-flow gate and sudden expansion energy dissipator to determine discharge coefficients for full and partial gate openings,head losses through the facility,cavitation characteristics,and the back-pressure requirements for the submerged jet-flow gate. The two-diameter expansion was inadequate and was replaced by a three-diameter section. A method of cavitation scaling is discussed whereby visible and/or aurally detectable model incipient cavitation is used to determine incipient cavitation lines for a series of single gate openings and a range of discharges from no-flow through that obtained at maximum head. Using the slope of the model line and the scale vapor pressure,the prototype incipient cavitation line was obtained. A white-pigmented concrete curing compound was found to be satisfactory for use as a cavitation indicator.