Abstract
Abstract Multiple vessels sail together at sea through physical connection or non-physical connection attaching to each other to form a train, which is called “Sea-Train”. The “Sea-Train” is a new concept of multi-vessel navigation, which aims to minimize the collective resistance of its system. By reasonably optimizing the horizontal and vertical spacing of each ship, the “Sea-Train” uses the favorable wave interference between hulls to obtain drag reduction performance and increase its voyage. To investigate the resistance variation of formation “Sea-Train” with speed, transverse distance and longitudinal distance, Wigley ship is taken as the research object. Based on the STAR-CCM+ software platform, the VOF method and the K-Epsilon turbulence model are used to solve the Navier-Stokes equation to numerically simulate the motion of the “Sea-Train”. The total resistance and its components of the “Sea-Train” are calculated by CFD software, at different speeds and different formations, to analyze the characteristics and laws of hydrodynamic interference. Further analyzing the relationship between the resistance of the “Sea-Train” and the transverse and longitudinal distance, the wave patterns of the free surface and ship side are obtained by using the numerical simulation results. The mechanism of drag reduction is explored to provide theoretical basis for the layout optimization of “Sea-Train” at different speeds.
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