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Become a knowledge manager at UWC 2024
The American Nuclear Society is now accepting applications for knowledge managers to work during the 2024 Utility Working Conference and Vendor Technology Expo. This year’s UWC, “Nuclear Momentum: Advancing Our Clean Energy Future,” will be held August 4–7, 2024, at the JW Marriott Marco Island Beach Resort on Marco Island, Fla.=
S. G. Durbin, M. Yoda, S. I. Abdel-Khalik, D. L. Sadowski
Fusion Science and Technology | Volume 44 | Number 2 | September 2003 | Pages 307-311
Technical Paper | Fusion Energy - Chamber Technology | doi.org/10.13182/FST03-A352
Articles are hosted by Taylor and Francis Online.
Turbulent liquid sheets have been proposed to protect solid structures in fusion power plants by absorbing damaging radiation. Establishing an experimental design database for this flow would therefore be valuable in various thick liquid protection schemes. The effect of initial conditions on the flow free-surface fluctuation was studied experimentally for vertical turbulent sheets of water issuing downwards from nozzles of thickness (small dimension) = 1 - 1.5 cm into ambient air. Sheets issuing from nozzles with both two- and three-dimensional fifth-order polynomial contractions with exit aspect ratios of 6.7 and 10 were investigated at Reynolds numbers ranging from 2 × 104 to 1 × 105. Mean velocity and turbulence intensity profiles were measured just upstream of the nozzle exit using laser-Doppler velocimetry to quantify initial conditions. Planar laser-induced fluorescence was used to visualize the free surface geometry of the liquid sheet in the near-field region up to 25 downstream of the nozzle exit. Fluctuations of the free surface, or surface ripple, are characterized by the standard deviation in the position of the gas/liquid interface.