Electrokinetic-potential fluctuations generated by jet impingement

Reprinted from International journal of heat and mass transfer, v. 7 pages 159-167.CER63LD-JEC-12.Includes bibliographical references.Electrokinetic-potential fluctuations produced by a two-dimensional submerged water jet impinging on a plate have been measured. The potential fluctuations appear to be approximately proportional to the longitudinal-velocity fluctuations ux' in the neighborhood of the boundary. Normalized frequency distributions of potential-fluctuation measurements agree with velocity fluctuation data taken by Klebanoff and Laufer with a hot-wire anemometer at a dimensionless distance y/δ ∼- 10-3 from the wall. Assumptions made concerning the relationship between potential and velocity fluctuations give a possible explanation of the change in the shape of the potential-fluctuation spectrum with the flow velocity and the electrical conductivity of the water. Further analysis is required to establish a definite relationship between electrokinetic-potential fluctuations and velocity fluctuations occurring near a solid boundary

Atmospheric transport of hydrogen sulfide from proposed geothermal power plant (unit 18): predictions by physical modeling in a wind tunnel

CER77-78JEC-RLP3.Prepared for Pacific Gas and Electric Company.September 1977.Tests were conducted in the Colorado State University environmental wind tunnel facility of the transport and dispersion of the H2S plume emanating from a cooling tower (Unit 18) positioned at two locations near Anderson Springs, California. The wind tunnel tests were conducted with a cooling tower and terrain modeled to a scale of 1:1920. The effects of wind direction and wind speed upon the groundlevel H2S concentrations in the vicinity of Anderson Springs were established. Data obtained include photographs and motion pictures of smoke plume trajectories and ground-level tracer gas concentrations downwind of the cooling tower

Wind-tunnel study of downwash at the Bay Shore Power Station

CER78-79RLP-JEC54.Prepared for The Toledo Edison Company.Includes bibliographical references (pages 40-41).April 1979.The proposed Environmental Protection Agency stack height regulation gives regional administrators the authority to require a field or fluid modeling demonstration of an air quality problem due to downwash, wakes or eddies at existing sources. If the demonstration indicates the existence of an air quality problem then an existing source which increases its stack height may employ an empirical equation to determine the stack height credit it will receive. Since Toledo Edison is replacing its existing four stacks at the Bay Shore Power Station with one taller single stack, the requirement of the regulation seemingly must be satisfied before credit for the new stack is obtained. Toledo Edison contracted Colorado State University to conduct a fluid modeling investigation of the effect of structural generated downwash, wakes or eddies upon ground level concentrations. The tests were conducted using state of the art wind-tunnel testing procedures. Visualization and concentration measurements of the simulated plumes from the Bay Shore Power Station stacks were obtained for eight wind directions, three plant load conditions and one wind speed. For comparison several tests were run without the plant structure present. The results of the study show that the maximum concentration is in excess of the national ambient air quality standard for SO2 and is at least 40 percent in excess of the maximum concentration experienced in the absence of downwash, wakes, and eddy effects produced by nearby structures. The maximum concentration excess observed was approximately 650 percent

Atmospheric transport of hydrogen sulfide from proposed geothermal power plant (units 13, 14, 16, and 18) for the west wind direction: Predictions by physical modeling in a wind tunnel

CER77-78RLP-JEC10.Prepared for Pacific Gas and Electric Company.Includes bibliographical references (page 12).November 1977.Tests were conducted in the Colorado State University environmental wind tunnel facility of the transport and dispersion of the H2S plume emanating from cooling towers positioned at four locations in the Geysers area. The wind tunnel tests were conducted with the cooling towers and terrain modeled to a scale of 1:1920. Ground-level concentrations were measured in the vicinity of Anderson Springs for selected wind speeds and one wind direction. Ground-level concentration patterns were established for each test condition studied. Data obtained include photographs and motion pictures of smoke plume trajectories as well as ground-level tracer gas concentrations downwind of the cooling towers

Atmospheric transport of hydrogen sulfide from proposed geothermal power plant (unit 13). Predictions by physical modeling in a wind tunnel

CER76-77RLP-JEC-SA51.Prepared for Aminoil USA, Incorporated.Includes bibliographical references (page 32).April 1977

Heliostat-array wind-tunnel study

CER78-79RLE-JAP-JEC31.Prepared for Martin Marietta Aerospace.Includes bibliographical references (page 24).January 1979

Circulation of vented gases around biomedical research facility

For the University of New Mexico.July 1979.CER79-80JEC-RLP-SSA18.Includes bibliographical references

Wind-tunnel study of wind over an offshore platform helideck

CER78-79RE-JAP-JBC25.Prepared for Earl and Wright Consulting Engineers.Includes bibliographical references (page 16).December 1978