Abstract: As the dredging industry progresses into an era of efficacy， it is necessary to develop new energy dissipation methods to enhance the binning efficiency in the storage of trailing suction hopper dredger. Therefore， it is necessary to minimize the flow velocity and turbulent kinetic energy inside the mud storage during binning. This article employs three-dimensional numerical simulations to examine the influence of the internal blade angle and the blades number of Savonius rotor on the energy dissipation inside the hopper storage. The results indicate that the Savonius rotor can effectively reduce flow velocity and turbulent kinetic energy within the hopper storage， and thus the energy dissipation effect is significant. The optimal internal blade angle is found to be 180° with the number of blades being four. When the number of blades is more than four， the energy dissipation effect would not be improved notably. This study shows that Savonius rotor would have significant effect on the energy dissipation， providing a new design for improving the binning efficiency of trailing suction hopper dredgers.

Key words: Savonius rotor, flow velocity, turbulent kinetic energy, energy dissipation effect, binning efficiency