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Title: Bonneville Second Powerhouse ERDC Turbine Model Operating Range Investigation
Authors: Davidson, Robert A.
Keywords: Bonneville Dam (Or. And Wash.)
Fishes--Effect of dams on
Hydraulic models
Hydraulic turbines
Hydroelectric generators
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Series/Report no.: Technical Report (Coastal and Hydraulics Laboratory (U.S.));no.ERDC/CHL TR-18-13
Abstract: The Bonneville Second Powerhouse (B2) turbine model investigations were performed in support of the joint U.S. Army Corps of Engineers, Portland and Walla Walla Districts, Turbine Survival Program (TSP). The TSP was developed to evaluate juvenile fish passage through turbines, with emphasis on identifying turbine structures and operations responsible for fish injury. The purpose of this B2 turbine model study was to investigate potential risk of injury to juvenile fish passing through all regions of the B2 turbines water passageway, using the existing 1:25 scale physical hydraulic model of the B2 turbines. The model investigations were divided into five study areas. These include the stay vane and wicket gate cascade, the runner, the region immediately below the runner, the exit of each of the two draft tube barrels, and the immediate tailrace region. Results from this model investigation indicate operations with steeper blade angles, resulting in higher unit discharge, create better passage conditions for fish. Fewer severe contacts with the turbine runner and less severe change in direction occur at steeper blade angles. The draft tube performs better at steeper blade angles, and the quality of flow exiting the draft tube is better at steeper blade angles. In addition, model experiments indicate egress conditions may be better at steeper blade angles.
Description: Technical Report
Gov't Doc #: ERDC/CHL TR-18-13
Rights: Approved for public release; distribution is unlimited
Appears in Collections:Technical Report

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