State Water Resources Research Institute Program


Project ID: 2007KY93B
Title: A three dimensional computational fluid dynamic code for simulation of pump stations with vertical plunging jet with air entrainment and bubble transport
Project Type: Research
Start Date: 3/01/2007
End Date: 2/29/2008
Congressional District: KY 6th
Focus Categories: Models, Hydrology, Methods
Keywords: hydrodynamics, eddy simulation, modeling
Principal Investigator: Yost, Scott
Federal Funds: $ 5,000
Non-Federal Matching Funds: $ 10,258
Abstract: A water jet plunging into a body of water is common in natural and manmade structures. Plunging water causes significant turbulence and air entrainment, which lead to a complex and unpredictable flow field. In pump station design, turbulence and adverse flow fields can lead to the formation of vortices and air entrainment can be devastating to pump operation. Large bubbles entrained into the system have a reasonable chance of escape to the free surface without causing many problems. However, smaller bubbles, which are less buoyant, can remain and migrate in the system into pump intakes. These smaller bubbles not only cause deterioration of pump efficiency, but also excess wear on the pump and motor. This study will concentrate on the improvement of an existing computational fluid dynamic code to take into consideration air entrainment and transport, coupled with the hydrodynamics of a plunging water jet.

Progress/Completion Report, PDF

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