Abstract
The article presents the results of a study of the influence of wing-shaped sail position on the motion parameters and hydrodynamic characteristics of a submerged body moving in shallow water. The sail was located at the bow and stern ends, as well as on the midship frame of the body model. The magnitude of the vertical displacement of the models under the influence of the lifting force for the given values of the Froude number Fr was determined experimentally in an experimental tank. A series of numerical calculations were performed based on the obtained data. The values of hydrostatic and hydrodynamic pressure arising from the movement of the models were determined. It was found that the presence of the sail led to an abrupt change in the area of hydrostatic pressure at its location. When the model with the sail located on the midship frame moved at a relative speed of Fr = 0,3 – 0,5, the nature of wave formation and total resistance significantly decreased due to the interference of wave systems. The highest values of hydrodynamic characteristics over the entire speed range were recorded for the movement of the model with the sail located in the bow. The study showed that the location of the conning tower on the surface of the underwater vehicle, in the mid-hull, is the most optimal in terms of total resistance and lift force.
Keywords: submerged body, sail, free liquid surface, hydrodynamic characteristics