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Brownlee Dam

The Idaho Power Company's Brownlee Dam, situated on the Snake River.

The Idaho Power Company’s Brownlee Dam, situated on the Snake River.

The effect of spillway deflectors on the flow field in the tailrace of Brownlee Dam was experimentally and numerically studied. Several flowrates and spillway designs were analyzed. Dramatic changes in the flow field with and without the inclusion of the deflectors were observed. Deflectors caused surface jets that attracted most of the powerhouse flow into the spillway region.

Spillway deflectors affected the flow field in the tailrace of Brownlee Dam.

Spillway deflectors affected the flow field in the tailrace of Brownlee Dam.

sotropic single and multiphase flow models were used to simulate the flow field. Only TDG-MP3, which accounts for the presence of the bubbles and anisotropy of the turbulence, was capable to predict the strong measured water entrainment in the reduced scale model. Spillway surface jets predicted with TDG-MP3 stayed longer at the surface than those using standards CFD models, which resulted in more water attraction toward the spillway region. Please read Turan et al. (2006a) in Publications for more details about the Brownlee model.

 

The effect of spillway deflectors on the flow field of the Brownlee Dam tailrace.

The effect of spillway deflectors on the flow field of the Brownlee Dam tailrace.

Last modified on March 2nd, 2015
Posted on March 16th, 2012