The assessment of the hydro-jacking risk of the pressurized water tunnel by theoretical and numerical method

2011 ◽  
pp. 401-406
Author(s):  
T Ha ◽  
Y Shin ◽  
H Lee ◽  
H Yang
Keyword(s):  
Numerical Method ◽  
Water Tunnel ◽  
Pressurized Water

A Theoretical and Experimental Study on the Planform of Superventilated Wings

1974 ◽  
Vol 18 (03) ◽  
pp. 169-184
Author(s):  
L. F. Tsen ◽  
M. Guilbaud
Keyword(s):  
Experimental Study ◽  
Aspect Ratio ◽  
Numerical Method ◽  
Lower Surface ◽  
Cavitation Number ◽  
Water Tunnel ◽  
Surface Theory ◽  
Lifting Surface ◽  
Measured Force

This study explores the influence of the aspect ratio, the taper ratio, and the sweepback on the flow over trapezoidal superventilated wings with a flat wetted lower surface. The flow is first calculated by a numerical method in the scope of the linearized supercavitating lifting-surface theory. The calculated wings are then made and tested in a water tunnel at zero cavitation number. The measured force and moment coefficients are compared with the prediction.

Cavitating Propeller Experiment (CAPREX III): Measurement and Prediction of Tunnel Pressures

1998 ◽  
Vol 42 (03) ◽  
pp. 233-248
Author(s):  
Spyros A. Kinnas ◽  
Richard W. Kimball ◽  
Jin-Keun Choi
Keyword(s):  
Numerical Method ◽  
Pressure Field ◽  
Phase Iii ◽  
Variable Pressure ◽  
Water Tunnel ◽  
Time Varying ◽  
Tunnel Wall ◽  
Unsteady Pressure ◽  
Pressure Water ◽  
Three Components

This paper first describes Phase III of the CAvitating PRopeller Experiment (CAPREX) performed at MIT's variable pressure water tunnel. The three components of the screen-generated nominal wake inflow were measured using an LDV system. The unsteady pressure field on the upper tunnel wall for the first three blade harmonics was also measured in a 5 × 5 grid above the propeller tip, for various propeller cavitation conditions from fully wetted to supercavitating. Then, a recently developed numerical method which models the flow of a cavitating propeller inside a tunnel is used for the calculation of the pressures on the tunnel walls. The effects of a time-varying blade cavity source and of the flexibility of the tunnel walls are included in the calculation. Lastly, the amplitudes of the first blade harmonics of the predicted pressures are compared directly with those measured in the experiment.

Leaching Studies of Cement-Glass Package Containing Sodium Borate

1986 ◽  
Vol 84 ◽  
Author(s):  
Masahiro Okamoto ◽  
Koichi Chino ◽  
Tsutomu Baba ◽  
Tatsuo Izumida ◽  
Fumio Kawamura ◽  
...  
Keyword(s):  
Sodium Silicate ◽  
Liquid Waste ◽  
Sodium Borate ◽  
Pressurized Water Reactor ◽  
X Ray Diffraction ◽  
Adsorption Ability ◽  
Pressurized Water ◽  
X Ray ◽  
Solidification Reaction ◽  
Main Components

AbstractA new solidification technique using cement-glass, which is a mixture of sodium silicate, cement, additives, and initiator of the solidification reaction, was developed for sodium borate liquid waste generated from pressurized water reactor (PWR) plants. The cement-glass could solidify eight times as much sodium borate as cement could, because the solidifying reaction of the cement-glass is not hindered by borate ions.The reaction mechanism of sodium silicate and phosphoric silicate (initiator), the main components of cement-glass, was studied through X-ray diffraction and compressive strength measurements. It was found that three- dimensionally bonded silicon dioxide was produced by polymerization of the two silicates. The leaching ratio of cesium from the cement-glass package was one-tenth that of the cement one. This low value was attributed to a high cesium adsorption ability of the cement-glass and it could be theoretically predicted accordingly.

Water Tunnel to test and characterization of experimental designs of Hydrokinetics Turbines

2018 ◽  
Vol 1 (6) ◽  
Author(s):  
Eduardo Alvarez-Alvarez ◽  
Aitor Fernandez-Jimenez ◽  
Manuel Rico-Secades ◽  
Antonio Javier Calleja-Rodriguez ◽  
Joaquin Fernandez-Francos ◽  
...  
Keyword(s):  
Experimental Designs ◽  
Water Tunnel
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