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Title: Entrainment descriptions for mathematical modeling of pumped-storage inflows in reservoirs
Authors: Georgia Institute of Technology. School of Civil and Environmental Engineering.
Hydraulics Laboratory (U.S.)
Environmental and Water Quality Operational Studies (U.S.)
Roberts, Philip J. W. (Philip Joseph William), 1946-
Dortch, Mark S.
Keywords: Entrainment
Inflow jets
Mathematical models
Numerical models
Pumped-storage reservoirs
Water quality
Fluid dynamics
Air entrainment
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: During hydropower generation and pumpback operations of pumped-storage projects, inflows are introduced into the reservoir system. These jetlike inflows often cause considerable entrainment of ambient water. The entrainment process can have a strong influence on the vertical distribution of reservoir water quality when pumped-storage inflow jets are discharged into a stratified reservoir. The objective of this study was to develop algorithms to describe the pumped-storage inflow entrainment process for use in reservoir water quality models. Pumped-storage inflow jets fall into two classes: strongly or weakly buoyant. The former class has been fairly extensively studied, and well-established mathematical models exist to predict their behavior. For this case, incorporation into a reservoir thermal model simply required adaptation of existing code. For the latter case , however, that of weakly buoyant jets, it was found that little information existed of either a theoretical or experimental nature. For that reason, an extensive series of experiments of a fundamental nature were performed on weakly buoyant jets into arbitrary stratification. The results were then reduced to a form suitable for inclusion into reservoir water quality simulation models. The developed algorithms were incorporated into an existing reservoir thermal simulation code, and a test application was made for Carters Lake, a Corps of Engineers pumped-storage project in Georgia.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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