Suppression of Sloshing and Energy Dissipation Mechanism by Internal Flow in a Rectangular Vessel with Double Bulkheads

Abstract

This paper deals with sloshing suppression and energy dissipation due to internal flow in a rectangular vessel with double bulkheads. In this study, first, the effect of double bulkheads spacing on the sloshing suppression characteristics is clarified experimentally. Next, the effects of bulkheads aperture height on the sloshing suppression characteristics are clarified for double bulkheads. The relationship between internal flow in the vessel and suppression characteristics is also investigated by experiment and PIV. As a result, the more the two bulkheads are inserted equally spaced in the vessel, the more effective they are in the suppression of the sloshing. In addition, the deeper the bulkheads are inserted, the more effective they are. Furthermore, it is found that the sloshing energy is dissipated by the vortex and swirling flow generated in the vessel, creating a sloshing suppression effect. Finally, the fluid forces acting on the bulkheads are clarified by numerical analysis, and the characteristics of multiple bulkheads are discussed.