MODE OF REDUCING HYDRODYNAMIC RESISTANCE Russian patent published in 2006 - IPC B63B1/32 F15D1/06 

FIELD: the invention refers to hydraulic engineering and may be used in shipbuilding, at construction pipelines and in medicine.

SUBSTANCE: the mode of reducing hydrodynamic resistance is in that bending or longitudinal elastic vibrations of one and the same frequency with phase difference π/4 are excited on the non contacting with water surfaces of a transport vehicle or a pipeline. The longitudinal vibrations are excited in parallel to the movement of the transport vehicle in water or flow of liquid in a pipeline. The bending and longitudinal vibrations are mutually perpendicular , in connection with that in case of its presence the sections of the surface of the transport vehicle or of the pipeline make rotating movement along elliptical trajectories involving in the movement the frontier layer of the liquid with frequency vibrations. In technical constructions and in facilities of small sizes the mode is used with ultrasound frequencies.

EFFECT: increases effectiveness of the technology of reducing hydrodynamic resistance of ships, submarines, in pipelines and also in medical technical means.

1 cl, 2 dwg