Abstract
The article presents a study of the effect of roughness and waviness (including taking into account bioburden) on the hydrodynamic characteristics of the vessel. To carry out the experiments, a model of the hull of the vessel was developed, which includes the submerged underwater part of the vessel and a special channel in which the flow is modeled. Biological contamination (bio-fouling of the underwater hull) of seaships and river-ships is a problem for all fleets. To maintain the speed of a ship with biological contamination, the hull requires an increase in diesel power by increasing the fuel supply. To maintain the speed of a ship with biological contamination, the requires an increase in diesel power by increasing the fuel supply. It affects the economy and environmental friendliness of maritime transport. The model investigated the change in fluid velocity during flow around a "clean surface" with a roughness of 75, 100, 125 microns. Numerical modeling showed a slight effect of changes in coating roughness for a “clean surface”. Numerical modeling for a surface contaminated with biological contaminants (roughness of 750 micron) revealed a significant effect on the change in fluid velocity along the hull. The developed model can be used when conducting research for a comparative assessment of the energy efficiency of ships.
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