Sloshing phenomenon is one of the major concerns in design of liquid storage tanks undergoing ground excitation. Reducing the sloshing and consequent environmental damages and economic losses can result in a safer and better design. To prevent such effects, obstacles like baffles can be placed in the oscillating liquid; fluid separation around baffles results in energy dissipation and reduction in sloshing amplitude and consequent hydrodynamic loads. The potential of baffles in increasing the hydrodynamic damping of sloshing in circular-cylindrical storage tanks is investigated in this study. Based on the widespread use of baffles in moving liquid containers especially in space vehicles, the ability of baffles in reducing the sloshing effects in storage tanks that are especially broader than fuel containers was under question. Concerning horizontal ring and vertical blade baffles, an estimation of hydrodynamic damping ratio of liquid sloshing in baffled tanks undergoing horizontal excitation has been developed analytically using Laplace's differential equation solution. This method involves the assessment of dissipated fraction of total sloshing oscillation energy, which is caused by the flow separation around the baffles. A series of experiments employing a tank model on a shake-table has been carried out to validate the theoretically predicted damping ratio. A parametric study showed that the ring baffles are more effective in reducing the sloshing oscillations.
Sloshing damping in cylindrical liquid storage tanks with baffles
Dämpfung der Schwappbewegung in zylindrischen Flüssigkeitstanks mit Schwalldämpfern
Journal of Sound and Vibration ; 311 , 1/2 ; 372-385
2008
14 Seiten, 18 Bilder, 15 Quellen
Article (Journal)
English
Sloshing damping in cylindrical liquid storage tanks with baffles
Online Contents | 2008
|Analysis of flexible baffles for damping tank sloshing
AIAA | 1966
|Analysis of flexible baffles for damping tank sloshing.
AIAA | 1967
|Sloshing in shallow cylindrical tanks
Online Contents | 1995
|Sloshing of liquids in cylindrical tanks
AIAA | 1984
|