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OLS Field Name OLS Field Data
Main Title Measurement of Buoyant Jet Entrainment from Single and Multiple Sources.
Author Davis, L. R. ; Shirazi, M. A. ; Slegel, D. I. ;
CORP Author Corvallis Environmental Research Lab., OR.
Year Published 1977
Report Number EPA/600/J-77/129;
Stock Number PB-287 001
Additional Subjects Cooling towers ; Fluid flow ; Hydraulic jets ; Dimensionless numbers ; Entrainment ; Thermal pollution ; Water pollution ; Plumes ; Dilution ; Buoyancy ; Air entrainment ; Froude number ; Waste heat ; Point sources ; Reprints ; Mechanical draft cooling towers ; Waste water ; Natural draft cooling towers ; Buoyant plume model
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-287 001 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 10p
Abstract
An experimental investigation was conducted to determine the dilution characteristics of single and multiple discharges typical of modern natural and mechanical draft cooling towers. Simultaneous measurements of velocity and tracer concentration profiles were taken at various downstream locations in three-dimensional plumes discharged into a stagnant ambient using a hot film anemometer and conductivity probe. The number of discharge ports was varied from one to seven. Discharge densimetric Froude numbers were varied from 1.5 to infinity. Numerical intergration of the profiles gave dilution tracer conservation, and momentum fluxes. The effect of reducing Froude number was to increase entrainment considerably. Increasing the number of discharge ports reduced the rate of entrainment. In multiple port discharges the shape of the plume changed from an elongated configuration to nearly axisymmetric within the first 20-30 diameters of discharge.